diff --git a/.travis.yml b/.travis.yml
index 21eccb70f..a87191450 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,9 +26,6 @@ notifications:
 
 matrix:
   include:
-    - env: CABALVER=1.24 GHCVER=7.6.3
-      compiler: ": #GHC 7.6.3"
-      addons: {apt: {packages: [cabal-install-1.24,ghc-7.6.3,alex-3.1.7,happy-1.19.5], sources: [hvr-ghc]}}
     - env: CABALVER=1.24 GHCVER=7.8.4
       compiler: ": #GHC 7.8.4"
       addons: {apt: {packages: [cabal-install-1.24,ghc-7.8.4,alex-3.1.7,happy-1.19.5], sources: [hvr-ghc]}}
diff --git a/Distribution/Server/Features.hs b/Distribution/Server/Features.hs
index fa2e13256..92e8f546e 100644
--- a/Distribution/Server/Features.hs
+++ b/Distribution/Server/Features.hs
@@ -31,7 +31,7 @@ import Distribution.Server.Features.Documentation       (initDocumentationFeatur
 import Distribution.Server.Features.BuildReports        (initBuildReportsFeature)
 import Distribution.Server.Features.LegacyRedirects     (legacyRedirectsFeature)
 import Distribution.Server.Features.PreferredVersions   (initVersionsFeature)
--- [reverse index disabled] import Distribution.Server.Features.ReverseDependencies (initReverseFeature)
+import Distribution.Server.Features.ReverseDependencies (initReverseFeature)
 import Distribution.Server.Features.DownloadCount       (initDownloadFeature)
 import Distribution.Server.Features.Tags                (initTagsFeature)
 import Distribution.Server.Features.Search              (initSearchFeature)
@@ -127,8 +127,8 @@ initHackageFeatures env@ServerEnv{serverVerbosity = verbosity} = do
                                initTagsFeature env
     mkVersionsFeature       <- logStartup "versions" $
                                initVersionsFeature env
-    -- mkReverseFeature     <- logStartup "reverse deps" $
-    --                         initReverseFeature env
+    mkReverseFeature        <- logStartup "reverse deps" $
+                               initReverseFeature env
     mkListFeature           <- logStartup "list" $
                                initListFeature env
     mkSearchFeature         <- logStartup "search" $
@@ -241,24 +241,27 @@ initHackageFeatures env@ServerEnv{serverVerbosity = verbosity} = do
     tagsFeature     <- mkTagsFeature
                          coreFeature
                          uploadFeature
+                         usersFeature
 
     versionsFeature <- mkVersionsFeature
                          coreFeature
                          uploadFeature
                          tagsFeature
 
-    {- [reverse index disabled]
     reverseFeature  <- mkReverseFeature
                          coreFeature
                          versionsFeature
-                         -}
+
 
     listFeature     <- mkListFeature
                          coreFeature
-                         -- [reverse index disabled] reverseFeature
+                         reverseFeature
                          downloadFeature
+                         votesFeature
                          tagsFeature
                          versionsFeature
+                         usersFeature
+                         uploadFeature
 
     searchFeature   <- mkSearchFeature
                          coreFeature
@@ -273,7 +276,7 @@ initHackageFeatures env@ServerEnv{serverVerbosity = verbosity} = do
                          uploadFeature
                          candidatesFeature
                          versionsFeature
-                         -- [reverse index disabled] reverseFeature
+                         reverseFeature
                          tagsFeature
                          downloadFeature
                          votesFeature
@@ -338,7 +341,7 @@ initHackageFeatures env@ServerEnv{serverVerbosity = verbosity} = do
          , getFeatureInterface downloadFeature
          , getFeatureInterface tagsFeature
          , getFeatureInterface versionsFeature
-         -- [reverse index disabled] , getFeatureInterface reverseFeature
+         , getFeatureInterface reverseFeature
          , getFeatureInterface searchFeature
          , getFeatureInterface listFeature
          , getFeatureInterface platformFeature
diff --git a/Distribution/Server/Features/Core.hs b/Distribution/Server/Features/Core.hs
index 60fa1d581..c8fab0d7a 100644
--- a/Distribution/Server/Features/Core.hs
+++ b/Distribution/Server/Features/Core.hs
@@ -230,7 +230,6 @@ data CoreResource = CoreResource {
 
     -- | Find a PackageId or PackageName inside a path.
     packageInPath :: forall m a. (MonadPlus m, FromReqURI a) => DynamicPath -> m a,
-
     -- | Find a tarball's PackageId from inside a path, doing some checking
     -- for consistency between the package and tarball.
     --
diff --git a/Distribution/Server/Features/Html.hs b/Distribution/Server/Features/Html.hs
index 33ac9d86b..9cd03b9d6 100644
--- a/Distribution/Server/Features/Html.hs
+++ b/Distribution/Server/Features/Html.hs
@@ -19,7 +19,7 @@ import Distribution.Server.Features.Votes
 import Distribution.Server.Features.Search
 import Distribution.Server.Features.Search as Search
 import Distribution.Server.Features.PreferredVersions
--- [reverse index disabled] import Distribution.Server.Features.ReverseDependencies
+import Distribution.Server.Features.ReverseDependencies
 import Distribution.Server.Features.PackageContents (PackageContentsFeature(..))
 import Distribution.Server.Features.PackageList
 import Distribution.Server.Features.Tags
@@ -39,14 +39,13 @@ import qualified Distribution.Server.Users.Users as Users
 import qualified Distribution.Server.Packages.PackageIndex as PackageIndex
 import Distribution.Server.Users.Group (UserGroup(..))
 import Distribution.Server.Features.Distro.Distributions (DistroPackageInfo(..))
--- [reverse index disabled] import Distribution.Server.Packages.Reverse
 
 import qualified Distribution.Server.Pages.Package as Pages
 import qualified Distribution.Server.Pages.PackageFromTemplate as PagesNew
 import Distribution.Server.Pages.Template
 import Distribution.Server.Pages.Util
+import Distribution.Server.Pages.Reverse
 import qualified Distribution.Server.Pages.Group as Pages
--- [reverse index disabled] import qualified Distribution.Server.Pages.Reverse as Pages
 import qualified Distribution.Server.Pages.Index as Pages
 import Distribution.Server.Util.CountingMap (cmFind, cmToList)
 import Distribution.Server.Util.ServeTarball (loadTarEntry)
@@ -60,7 +59,6 @@ import Distribution.PackageDescription
 import Data.List (intercalate, intersperse, insert, sortBy)
 import Data.Function (on)
 import qualified Data.Map as Map
-import Data.Set (Set)
 import qualified Data.Set as Set
 import qualified Data.Vector as Vec
 import Data.Maybe (fromMaybe, isJust)
@@ -72,8 +70,6 @@ import Data.Array (Array, listArray)
 import qualified Data.Array as Array
 import qualified Data.Ix    as Ix
 import Data.Time.Format (formatTime)
-import Data.Time.Clock (getCurrentTime)
-import qualified Data.Time.Format.Human as HumanTime
 import Data.Time.Locale.Compat (defaultTimeLocale)
 import qualified Data.ByteString.Lazy as BS (ByteString)
 
@@ -107,7 +103,7 @@ initHtmlFeature :: ServerEnv
                     -> PackageContentsFeature
                     -> UploadFeature -> PackageCandidatesFeature
                     -> VersionsFeature
-                    -- [reverse index disabled] -> ReverseFeature
+                    -> ReverseFeature
                     -> TagsFeature -> DownloadFeature
                     -> VotesFeature
                     -> ListFeature -> SearchFeature
@@ -131,13 +127,16 @@ initHtmlFeature env@ServerEnv{serverTemplatesDir, serverTemplatesMode,
                    , "distro-monitor.html"
                    , "revisions.html"
                    , "package-page.html"
+                   , "table-interface.html"
+                   , "tag-edit.html"
+                   , "graph.html"
                    ]
 
 
     return $ \user core@CoreFeature{packageChangeHook}
               packages upload
               candidates versions
-              -- [reverse index disabled] reverse
+              reversef
               tags download
               rank
               list@ListFeature{itemUpdate}
@@ -152,6 +151,7 @@ initHtmlFeature env@ServerEnv{serverTemplatesDir, serverTemplatesMode,
                 htmlFeature env user core
                             packages upload
                             candidates versions
+                            reversef
                             tags download
                             rank
                             list names
@@ -160,7 +160,8 @@ initHtmlFeature env@ServerEnv{serverTemplatesDir, serverTemplatesMode,
                             tarIndexCache
                             reportsCore
                             usersdetails
-                            (htmlUtilities core tags)
+                            (htmlUtilities core tags user)
+                            (reverseHtmlUtil reversef)
                             mainCache namesCache
                             templates
 
@@ -196,6 +197,7 @@ htmlFeature :: ServerEnv
             -> UploadFeature
             -> PackageCandidatesFeature
             -> VersionsFeature
+            -> ReverseFeature
             -> TagsFeature
             -> DownloadFeature
             -> VotesFeature
@@ -209,6 +211,7 @@ htmlFeature :: ServerEnv
             -> ReportsFeature
             -> UserDetailsFeature
             -> HtmlUtilities
+            -> ReverseHtmlUtil
             -> AsyncCache Response
             -> AsyncCache Response
             -> Templates
@@ -219,7 +222,7 @@ htmlFeature env@ServerEnv{..}
             core@CoreFeature{queryGetPackageIndex}
             packages upload
             candidates versions
-            -- [reverse index disabled] ReverseFeature{..}
+            revf@ReverseFeature{..}
             tags download
             rank
             list@ListFeature{getAllLists}
@@ -230,6 +233,7 @@ htmlFeature env@ServerEnv{..}
             reportsCore
             usersdetails
             utilities@HtmlUtilities{..}
+            reverseH@ReverseHtmlUtil{..}
             cachePackagesPage cacheNamesPage
             templates
   = (HtmlFeature{..}, packageIndex, packagesPage)
@@ -266,10 +270,14 @@ htmlFeature env@ServerEnv{..}
                                       distros
                                       packages
                                       htmlTags
+                                      htmlReverse
+                                      revf
                                       htmlPreferred
                                       cachePackagesPage
                                       cacheNamesPage
                                       templates
+                                      list
+                                      names
     htmlUsers      = mkHtmlUsers      user usersdetails
     htmlUploads    = mkHtmlUploads    utilities upload
     htmlDocUploads = mkHtmlDocUploads utilities core docsCore templates
@@ -279,8 +287,9 @@ htmlFeature env@ServerEnv{..}
                                       docsCandidates tarIndexCache
                                       candidates templates
     htmlPreferred  = mkHtmlPreferred  utilities core versions
-    htmlTags       = mkHtmlTags       utilities core list tags
-    htmlSearch     = mkHtmlSearch     utilities core list names
+    htmlTags       = mkHtmlTags       utilities core upload user list tags templates
+    htmlReverse    = mkHtmlReverse    utilities core versions list revf reverseH
+    htmlSearch     = mkHtmlSearch     utilities core list names templates
 
     htmlResources = concat [
         htmlCoreResources       htmlCore
@@ -292,6 +301,7 @@ htmlFeature env@ServerEnv{..}
       , htmlPreferredResources  htmlPreferred
       , htmlDownloadsResources  htmlDownloads
       , htmlTagsResources       htmlTags
+      , htmlReverseResource     htmlReverse
       , htmlSearchResources     htmlSearch
       -- and user groups. package maintainers, trustees, admins
       , htmlGroupResource user (maintainersGroupResource . uploadResource $ upload)
@@ -328,74 +338,6 @@ htmlFeature env@ServerEnv{..}
           }
       -}
 
-
-      -- reverse index (disabled)
-      {-
-      , (extendResource $ reversePackage reverses) {
-            resourceGet = [("html", serveReverse True)]
-          }
-      , (extendResource $ reversePackageOld reverses) {
-            resourceGet = [("html", serveReverse False)]
-          }
-      , (extendResource $ reversePackageAll reverses) {
-            resourceGet = [("html", serveReverseFlat)]
-          }
-      , (extendResource $ reversePackageStats reverses) {
-            resourceGet = [("html", serveReverseStats)]
-          }
-      , (extendResource $ reversePackages reverses) {
-            resourceGet = [("html", serveReverseList)]
-          }
-      -}
-
-
-
-    -- [reverse index disabled] reverses = reverseResource
-
-
-
-
-
-
-    {- [reverse index disabled]
-    --------------------------------------------------------------------------------
-    -- Reverse
-    serveReverse :: Bool -> DynamicPath -> ServerPart Response
-    serveReverse isRecent dpath =
-      htmlResponse $
-      withPackageId dpath $ \pkgid -> do
-        let pkgname = packageName pkgid
-        rdisp <- case packageVersion pkgid of
-                  Version [] [] -> withPackageAll pkgname   $ \_ -> revPackageName pkgname
-                  _             -> withPackageVersion pkgid $ \_ -> revPackageId pkgid
-        render <- (if isRecent then renderReverseRecent else renderReverseOld) pkgname rdisp
-        return $ toResponse $ Resource.XHtml $ hackagePage (display pkgname ++ " - Reverse dependencies ") $
-            Pages.reversePackageRender pkgid (corePackageIdUri "") revr isRecent render
-
-    serveReverseFlat :: DynamicPath -> ServerPart Response
-    serveReverseFlat dpath = htmlResponse $
-                                      withPackageAllPath dpath $ \pkgname _ -> do
-        revCount <- query $ GetReverseCount pkgname
-        pairs <- revPackageFlat pkgname
-        return $ toResponse $ Resource.XHtml $ hackagePage (display pkgname ++ "Flattened reverse dependencies") $
-            Pages.reverseFlatRender pkgname (corePackageNameUri "") revr revCount pairs
-
-    serveReverseStats :: DynamicPath -> ServerPart Response
-    serveReverseStats dpath = htmlResponse $
-                                       withPackageAllPath dpath $ \pkgname pkgs -> do
-        revCount <- query $ GetReverseCount pkgname
-        return $ toResponse $ Resource.XHtml $ hackagePage (display pkgname ++ "Reverse dependency statistics") $
-            Pages.reverseStatsRender pkgname (map packageVersion pkgs) (corePackageIdUri "") revr revCount
-
-    serveReverseList :: DynamicPath -> ServerPart Response
-    serveReverseList _ = do
-        let revr = reverseResource revs
-        triple <- sortedRevSummary revs
-        hackCount <- PackageIndex.indexSize <$> queryGetPackageIndex
-        return $ toResponse $ Resource.XHtml $ hackagePage "Reverse dependencies" $
-            Pages.reversePackagesRender (corePackageNameUri "") revr hackCount triple
-    -}
-
     --------------------------------------------------------------------------------
     -- Additional package indices
 
@@ -437,7 +379,8 @@ htmlFeature env@ServerEnv{..}
 
 {-------------------------------------------------------------------------------
   Core
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlCore = HtmlCore {
     htmlCoreResources :: [Resource]
@@ -458,15 +401,19 @@ mkHtmlCore :: ServerEnv
            -> DistroFeature
            -> PackageContentsFeature
            -> HtmlTags
+           -> HtmlReverse
+           -> ReverseFeature
            -> HtmlPreferred
            -> AsyncCache Response
            -> AsyncCache Response
            -> Templates
+           -> ListFeature
+           -> SearchFeature
            -> HtmlCore
 mkHtmlCore ServerEnv{serverBaseURI}
            utilities@HtmlUtilities{..}
-           UserFeature{queryGetUserDb}
-           CoreFeature{coreResource}
+           UserFeature{queryGetUserDb, checkAuthenticated}
+           CoreFeature{coreResource , queryGetPackageIndex}
            VersionsFeature{ versionsResource
                           , queryGetDeprecatedFor
                           , queryGetPreferredInfo
@@ -482,10 +429,14 @@ mkHtmlCore ServerEnv{serverBaseURI}
            DistroFeature{queryPackageStatus}
            PackageContentsFeature{packageRender}
            HtmlTags{..}
+           HtmlReverse{..}
+           ReverseFeature{queryReverseDeps, revJSON}
            HtmlPreferred{..}
            cachePackagesPage
            cacheNamesPage
            templates
+           ListFeature{makeItemList}
+           SearchFeature{..}
   = HtmlCore{..}
   where
     cores@CoreResource{packageInPath, lookupPackageName, lookupPackageId} = coreResource
@@ -513,6 +464,23 @@ mkHtmlCore ServerEnv{serverBaseURI}
       , (resourceAt "/packages/names" ) {
             resourceGet = [("html", const $ readAsyncCache cacheNamesPage)]
           }
+      , (resourceAt "/packages/browse" ) {
+            resourceDesc = [(GET, "Show browsable list of all packages")]
+        , resourceGet = [("html",
+                serveBrowsePage)]
+          }
+      , (resourceAt "/packages/graph.json" ) {
+            resourceDesc = [(GET, "Show JSON of package dependency information")]
+        , resourceGet = [("json",
+                serveGraphJSON)]
+          }
+
+      , (resourceAt "/packages/graph" ) {
+            resourceDesc = [(GET, "Show graph of package dependency information")]
+        , resourceGet = [("html",
+                serveGraph)]
+          }
+
       , (extendResource $ corePackagesPage cores) {
             resourceDesc = [(GET, "Show package index")]
           , resourceGet  = [("html", const $ readAsyncCache cachePackagesPage)]
@@ -541,16 +509,24 @@ mkHtmlCore ServerEnv{serverBaseURI}
         let realpkg = rendPkgId render
             pkgname = packageName realpkg
             docURL  = packageDocsContentUri docs realpkg
-
+            execs   = rendExecNames render
         prefInfo      <- queryGetPreferredInfo pkgname
         distributions <- queryPackageStatus pkgname
         totalDown     <- cmFind pkgname `liftM` totalPackageDownloads
         recentDown    <- cmFind pkgname `liftM` recentPackageDownloads
-        pkgVotesHtml  <- renderVotesHtml pkgname
+        pkgVotes      <- pkgNumVotes pkgname
+        pkgScore      <- fmap (/2) $ pkgNumScore pkgname
+        auth          <- checkAuthenticated
+        userRating    <- case auth of Just (uid,_) -> pkgUserVote pkgname uid; _ -> return Nothing
         mdoctarblob   <- queryDocumentation realpkg
+        rdeps         <- queryReverseDeps pkgname
         tags          <- queryTagsForPackage pkgname
         deprs         <- queryGetDeprecatedFor pkgname
         mreadme       <- makeReadme render
+        pkgnames <- searchPackages [unPackageName pkgname]
+        let (pageResults, moreResults) = splitAt 5 pkgnames
+        pkgDetails <- liftIO $ makeItemList pageResults
+        let related = toHtml $ resultsArea pkgDetails moreResults (unPackageName pkgname)
 
         buildStatus   <- renderBuildStatus
           documentationFeature reportsFeature realpkg
@@ -566,14 +542,21 @@ mkHtmlCore ServerEnv{serverBaseURI}
 
         return $ toResponse . template $
           -- IO-related items
-          [ "baseurl"           $= show (serverBaseURI)
+          [ "baseurl"           $= show serverBaseURI
           , "cabalVersion"      $= display cabalVersion
-          , "tags"              $= (renderTags tags)
-          , "versions"          $= (PagesNew.renderVersion realpkg
-              (classifyVersions prefInfo $ map packageVersion pkgs) infoUrl)
+          , "tags"              $= renderTags tags
+          , "versions"          $= PagesNew.renderVersion realpkg
+              (classifyVersions prefInfo $ map packageVersion pkgs) infoUrl
           , "totalDownloads"    $= totalDown
+          , "hasexecs"          $= not (null execs)
           , "recentDownloads"   $= recentDown
-          , "votesSection"      $= pkgVotesHtml
+          , "votes"             $= pkgVotes
+          , "userRating"        $= userRating
+          , "score"             $= pkgScore
+          , "related"           $= related
+          , "hasrdeps"          $= not (rdeps == ([],[]))
+          , "rdeps"             $= renderPkgPageDeps rdeps
+          , "rdepsummary"       $= renderDeps pkgname rdeps
           , "buildStatus"       $= buildStatus
           ] ++
           -- Items not related to IO (mostly pure functions)
@@ -583,6 +566,22 @@ mkHtmlCore ServerEnv{serverBaseURI}
             deprs
             utilities
           where
+            resultsArea pkgDetails moreResults termsStr =
+                [ case pkgDetails of
+                    [] -> toHtml "No matches"
+                    _  -> toHtml
+                          [ thediv << (intersperse (toHtml ", ") $ map (packageNameLink . itemName) (tail pkgDetails))
+                          , if null moreResults
+                              then noHtml
+                              else anchor ! [href moreResultsLink]
+                                         << "More results..."
+                          ]
+                ]
+              where
+                moreResultsLink =
+                    "/packages/search?"
+                 ++ "terms="   ++ escapeURIString isUnreserved termsStr
+
             makeReadme :: MonadIO m => PackageRender -> m (Maybe BS.ByteString)
             makeReadme render = case rendReadme render of
               Just (tarfile, _, offset, _) ->
@@ -610,6 +609,35 @@ mkHtmlCore ServerEnv{serverBaseURI}
         , "versions" $= map packageId pkgs
         ]
 
+
+    serveBrowsePage :: DynamicPath -> ServerPartE Response
+    serveBrowsePage _ = do
+      pkgIndex <- queryGetPackageIndex
+      let packageNames = Pages.toPackageNames pkgIndex
+      pkgDetails <- liftIO $ makeItemList packageNames
+      let rowList = map makeRow pkgDetails
+          tabledata = "" +++ rowList +++ ""
+      cacheControl [Public, maxAgeHours 1]
+                   (etagFromHash (PackageIndex.indexSize pkgIndex))
+      template <- getTemplate templates "table-interface.html"
+      return $ toResponse $ template
+        [ "heading"   $= "All packages"
+        , "content"   $= "A browsable index of all the packages"
+        , "tabledata" $= tabledata ]
+
+    serveGraphJSON :: DynamicPath -> ServerPartE Response
+    serveGraphJSON _ = do
+        graph <- revJSON
+        --TODO: use proper type for graph with ETag
+        cacheControl [Public, maxAgeMinutes 30] (etagFromHash graph)
+        ok . toResponse $ graph
+
+    serveGraph :: DynamicPath -> ServerPartE Response
+    serveGraph _ = do
+      cacheControlWithoutETag [Public, maxAgeDays 1] -- essentially static
+      template <- getTemplate templates "graph.html"
+      return $ toResponse $ template []
+
     serveDistroMonitorPage :: DynamicPath -> ServerPartE Response
     serveDistroMonitorPage dpath = do
       pkgname <- packageInPath dpath
@@ -661,7 +689,8 @@ mkHtmlCore ServerEnv{serverBaseURI}
 
 {-------------------------------------------------------------------------------
   Users
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlUsers = HtmlUsers {
     htmlUsersResources :: [Resource]
@@ -775,7 +804,8 @@ mkHtmlUsers UserFeature{..} UserDetailsFeature{..} = HtmlUsers{..}
 
 {-------------------------------------------------------------------------------
   Uploads
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlUploads = HtmlUploads {
     htmlUploadsResources :: [Resource]
@@ -823,7 +853,8 @@ mkHtmlUploads HtmlUtilities{..} UploadFeature{..} = HtmlUploads{..}
 
 {-------------------------------------------------------------------------------
   Documentation uploads
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlDocUploads = HtmlDocUploads {
     htmlDocUploadsResources :: [Resource]
@@ -870,7 +901,8 @@ mkHtmlDocUploads HtmlUtilities{..} CoreFeature{coreResource} DocumentationFeatur
 
 {-------------------------------------------------------------------------------
   Build reports
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlReports = HtmlReports {
     htmlReportsResources :: [Resource]
@@ -916,7 +948,8 @@ mkHtmlReports HtmlUtilities{..} CoreFeature{..} ReportsFeature{..} templates = H
 
 {-------------------------------------------------------------------------------
   Candidates
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlCandidates = HtmlCandidates {
     htmlCandidatesResources :: [Resource]
@@ -1173,7 +1206,8 @@ dependenciesPage isCandidate render =
 
 {-------------------------------------------------------------------------------
   Preferred versions
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlPreferred = HtmlPreferred {
     htmlPreferredResources :: [Resource]
@@ -1391,7 +1425,8 @@ mkHtmlPreferred HtmlUtilities{..}
 
 {-------------------------------------------------------------------------------
   Downloads
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlDownloads = HtmlDownloads {
     htmlDownloadsResources :: [Resource]
@@ -1421,7 +1456,7 @@ mkHtmlDownloads HtmlUtilities{..} DownloadFeature{..} = HtmlDownloads{..}
             [ tr << [ th << "Package name", th << "Downloads" ] ] ++
             [ tr ! [theclass (if odd n then "odd" else "even")] <<
                 [ td << packageNameLink pkgname
-                , td << [ toHtml $ (show count) ] ]
+                , td << [ toHtml (show count) ] ]
             | ((pkgname, count), n) <- zip pkgList [(1::Int)..] ]
 
     sortedPackages :: RecentDownloads -> [(PackageName, Int)]
@@ -1429,7 +1464,8 @@ mkHtmlDownloads HtmlUtilities{..} DownloadFeature{..} = HtmlDownloads{..}
 
 {-------------------------------------------------------------------------------
   Tags
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlTags = HtmlTags {
     htmlTagsResources :: [Resource]
@@ -1438,17 +1474,24 @@ data HtmlTags = HtmlTags {
 
 mkHtmlTags :: HtmlUtilities
            -> CoreFeature
+           -> UploadFeature
+           -> UserFeature
            -> ListFeature
            -> TagsFeature
+           -> Templates
            -> HtmlTags
 mkHtmlTags HtmlUtilities{..}
            CoreFeature{ coreResource = CoreResource{
                           packageInPath
-                        , lookupPackageName
+                        , guardValidPackageName
                         }
                       }
-           ListFeature{makeItemList}
-           TagsFeature{..} = HtmlTags{..}
+           UploadFeature{ maintainersGroup, trusteesGroup }
+           UserFeature{ guardAuthorised', guardAuthorised_ }
+           ListFeature{ makeItemList }
+           TagsFeature{..}
+           templates
+           = HtmlTags{..}
   where
     tags = tagsResource
 
@@ -1464,7 +1507,13 @@ mkHtmlTags HtmlUtilities{..}
             resourceGet = [("html", serveTagListing)]
           }
       , (extendResource $ packageTagsListing tags) {
-            resourcePut = [("html", putPackageTags)], resourceGet = []
+            resourcePut = [("html", putPackageTags)], resourceGet = [("html", showPackageTags)]
+          }
+      , (extendResource $ tagAliasEdit tags) {
+            resourcePut = [("html", putAliasEdit)]
+          }
+      , (extendResource $ tagAliasEditForm tags) {
+            resourceGet = [("html", serveAliasForm)]
           }
       , tagEdit -- (extendResource $ packageTagsEdit tags) { resourceGet = [("html", serveTagsForm)] }
       ]
@@ -1474,12 +1523,12 @@ mkHtmlTags HtmlUtilities{..}
         tagList <- queryGetTagList
         let withCounts = filter ((>0) . snd) . map (\(tg, pkgs) -> (tg, Set.size pkgs)) $ tagList
             countSort = sortBy (flip compare `on` snd) withCounts
-        return $ toResponse $ Resource.XHtml $ hackagePage "Hackage tags" $
+        return $ toResponse $ Resource.XHtml $ hackagePage "Hackage tags"
           [ h2 << "Hackage tags"
           , h4 << "By name"
-          , paragraph ! [theclass "toc"] << (intersperse (toHtml ", ") $ map (tagItem . fst) withCounts)
+          , paragraph ! [theclass "toc"] << intersperse (toHtml ", ") (map (tagItem . fst) withCounts)
           , h4 << "By frequency"
-          , paragraph ! [theclass "toc"] << (intersperse (toHtml ", ") $ map (toHtml . tagCountItem) countSort)
+          , paragraph ! [theclass "toc"] << intersperse (toHtml ", ") (map (toHtml . tagCountItem) countSort)
           ]
       where tagCountItem (tg, count) =
               [ tagItem tg
@@ -1487,24 +1536,59 @@ mkHtmlTags HtmlUtilities{..}
               ]
             tagItem tg = anchor ! [href $ tagUri tags "" tg] << display tg
 
+    putAliasEdit :: DynamicPath -> ServerPartE Response
+    putAliasEdit dpath = do
+        tagname <- tagInPath dpath
+        targetTag <- optional $ look "tags"
+        mergeTags targetTag (Tag tagname)
+        return $ toResponse $ Resource.XHtml $ hackagePage "Merged Tag"
+            [ h2 << "Merged tag"
+            , toHtml "Return to "
+            , anchor ! [href "/packages/tags"] << "tag listings"
+            ]
+
+    serveAliasForm :: DynamicPath -> ServerPartE Response
+    serveAliasForm dpath = do
+        tagname <- tagInPath dpath
+        guardAuthorised_ [InGroup trusteesGroup]
+
+        let aliasForm = [ thediv ! [theclass "box"] <<
+                            [h2 << ("Merge Tag " ++ tagname)
+                            , form ! [XHtml.method "post", action ("/packages/tag/" ++ tagname ++ "/alias")] <<
+                                [ hidden "_method" "PUT"
+                                , input ! [value "", name "tags", identifier "tags"]
+                                , toHtml " (Tag to merge with) ", br
+                                , input ! [thetype "submit", value "Merge"]
+                                ]
+                            ]
+                        ]
+        return $ toResponse $ Resource.XHtml $ hackagePage ("Merge Tag " ++ tagname) aliasForm
+
     serveTagListing :: DynamicPath -> ServerPartE Response
-    serveTagListing dpath =
+    serveTagListing dpath = do
+      tagname <- tagInPath dpath
       withTagPath dpath $ \tg pkgnames -> do
         let tagd = "Packages tagged " ++ display tg
             pkgs = Set.toList pkgnames
         items <- liftIO $ makeItemList pkgs
-        let (mtag, histogram) = Map.updateLookupWithKey (\_ _ -> Nothing) tg $ tagHistogram items
+        let rowList = map makeRow items
+            (mtag, histogram) = Map.updateLookupWithKey (\_ _ -> Nothing) tg $ tagHistogram items
             -- make a 'related tags' section, so exclude this tag from the histogram
             count = fromMaybe 0 mtag
-        return $ toResponse $ Resource.XHtml $ hackagePage tagd $
-          [ h2 << tagd
-          , case items of
+        template <- getTemplate templates "table-interface.html"
+        return $ toResponse $ template
+          [ "heading"   $= tagd
+          , "content"   $=  case items of
                 [] -> toHtml "No packages have this tag."
                 _  -> toHtml
                   [ paragraph << [if count==1 then "1 package has" else show count ++ " packages have", " this tag."]
+                  , anchor ! [href $  tagname ++ "/alias/edit"] << "[Merge tag]"
+                  , toHtml " (trustees only)"
                   , paragraph ! [theclass "toc"] << [toHtml "Related tags: ", toHtml $ showHistogram histogram]
-                  , ulist ! [theclass "packages"] << map renderItem items ]
+                  ]
+          , "tabledata" $= rowList
           ]
+
      where
       showHistogram hist = (++takeHtml) . intersperse (toHtml ", ") $
             map histogramEntry $ take takeAmount sortHist
@@ -1517,28 +1601,60 @@ mkHtmlTags HtmlUtilities{..}
     putPackageTags :: DynamicPath -> ServerPartE Response
     putPackageTags dpath = do
       pkgname <- packageInPath dpath
-      _       <- lookupPackageName pkgname -- TODO: necessary?
-      putTags pkgname
-      return $ toResponse $ Resource.XHtml $ hackagePage "Set tags"
-          [toHtml "Put tags for ", packageNameLink pkgname]
+      guardValidPackageName pkgname
+      addns <- optional $ look "addns"
+      delns <- optional $ look "delns"
+      raddns <- optional $ look "raddns"
+      rdelns <- optional $ look "rdelns"
+
+      putTags addns delns raddns rdelns pkgname
+      currTags <- queryTagsForPackage pkgname
+      revTags <- queryReviewTagsForPackage pkgname
+      let disp = renderReviewTags currTags revTags pkgname
+      return $ toResponse $ Resource.XHtml $ hackagePage "Package Tags" disp
+
+    showPackageTags :: DynamicPath -> ServerPartE Response
+    showPackageTags dpath = do
+      pkgname <- packageInPath dpath
+      currTags <- queryTagsForPackage pkgname
+      revTags <- queryReviewTagsForPackage pkgname
+      let disp = renderReviewTags currTags revTags pkgname
+      return $ toResponse $ Resource.XHtml $ hackagePage "Package Tags" disp
 
     -- serve form for editing, to be received by putTags
     serveTagsForm :: DynamicPath -> ServerPartE Response
     serveTagsForm dpath = do
       pkgname <- packageInPath dpath
       currTags <- queryTagsForPackage pkgname
-      let tagsStr = concat . intersperse ", " . map display . Set.toList $ currTags
-      return $ toResponse $ Resource.XHtml $ hackagePage "Edit package tags"
-        [paragraph << [toHtml "Set tags for ", packageNameLink pkgname],
-         form ! [theclass "box", XHtml.method "post", action $ packageTagsUri tags "" pkgname] <<
-          [ hidden "_method" "PUT"
-          , dlist . ddef . toHtml $ makeInput [thetype "text", value tagsStr] "tags" "Set tags to "
-          , paragraph << input ! [thetype "submit", value "Set tags"]
-          ]]
+      revTags <- queryReviewTagsForPackage pkgname
+      template <- getTemplate templates "tag-edit.html"
+      let toStr = intercalate ", " . map display . Set.toList
+          tagsStr = toStr currTags
+          addns = toStr $ fst  revTags
+          delns = toStr $ snd  revTags
+      trustainer <- guardAuthorised' [InGroup (maintainersGroup pkgname), InGroup trusteesGroup]
+      user <- guardAuthorised' [AnyKnownUser]
+      if trustainer || user
+        then return $ toResponse . template $
+          [ "pkgname"           $= display pkgname
+          , "addns"             $= addns
+          , "tags"              $= tagsStr
+          , "delns"             $= delns
+          , "istrustee"         $= trustainer
+          , "isuser"            $= not trustainer
+          ]
+        else return $ toResponse $ Resource.XHtml $ hackagePage "Error" [h2 << "Authorization Error"
+                                                                            , paragraph << "You need to be logged in to propose tags"]
+
+-- | Find a TagName inside a path.
+tagInPath :: forall m a. (MonadPlus m, FromReqURI a) => DynamicPath -> m a
+tagInPath dpath = maybe mzero return (lookup "tag" dpath >>= fromReqURI)
+
 
 {-------------------------------------------------------------------------------
   Search
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 data HtmlSearch = HtmlSearch {
     htmlSearchResources :: [Resource]
@@ -1548,11 +1664,14 @@ mkHtmlSearch :: HtmlUtilities
              -> CoreFeature
              -> ListFeature
              -> SearchFeature
+             -> Templates
              -> HtmlSearch
 mkHtmlSearch HtmlUtilities{..}
              CoreFeature{..}
              ListFeature{makeItemList}
-             SearchFeature{..} =
+             SearchFeature{..}
+             templates =
+
     HtmlSearch{..}
   where
     htmlSearchResources = [
@@ -1563,10 +1682,10 @@ mkHtmlSearch HtmlUtilities{..}
 
     servePackageFind :: DynamicPath -> ServerPartE Response
     servePackageFind _ = do
-        (mtermsStr, offset, limit, mexplain) <-
-          queryString $ (,,,) <$> optional (look "terms")
-                              <*> mplus (lookRead "offset") (pure 0)
-                              <*> mplus (lookRead "limit") (pure 100)
+        (mtermsStr,  mexplain) <-
+          queryString $ (,) <$> optional (look "terms")
+                              -- <*> mplus (lookRead "offset") (pure 0)
+                              -- <*> mplus (lookRead "limit") (pure 100)
                               <*> optional (look "explain")
         let explain = isJust mexplain
         case mtermsStr of
@@ -1581,18 +1700,23 @@ mkHtmlSearch HtmlUtilities{..}
                 , toHtml $ explainResults results
                 ]
 
-          Just termsStr | terms <- words termsStr, not (null terms) -> do
-            pkgIndex <- liftIO $ queryGetPackageIndex
-            currentTime <- liftIO $ getCurrentTime
-            pkgnames <- searchPackages terms
-            let (pageResults, moreResults) = splitAt limit (drop offset pkgnames)
-            pkgDetails <- liftIO $ makeItemList pageResults
-            return $ toResponse $ Resource.XHtml $
-              hackagePage "Package search" $
-                [ toHtml $ searchForm termsStr False
-                , toHtml $ resultsArea pkgIndex currentTime pkgDetails offset limit moreResults termsStr
-                , alternativeSearchTerms termsStr
-                ]
+          Just termsStr | terms <- words termsStr -> do
+            -- pkgIndex <- liftIO $ queryGetPackageIndex
+            -- currentTime <- liftIO $ getCurrentTime
+            pkgnames <- if null terms
+                        then fmap Pages.toPackageNames queryGetPackageIndex
+                        else searchPackages terms
+            -- let (pageResults, moreResults) = splitAt limit (drop offset pkgnames)
+            pkgDetails <- liftIO $ makeItemList pkgnames
+
+            let rowList = map makeRow pkgDetails
+                tabledata = "" +++ rowList
+            template <- getTemplate templates "table-interface.html"
+            return $ toResponse $ template
+              [ "heading"   $= toHtml (searchForm termsStr False)
+              , "content"   $= "A browsable index of all the packages"
+              , "tabledata" $= tabledata
+              , "footer"    $= alternativeSearchTerms termsStr]
 
           _ ->
             return $ toResponse $ Resource.XHtml $
@@ -1601,55 +1725,6 @@ mkHtmlSearch HtmlUtilities{..}
                 , alternativeSearch
                 ]
       where
-        resultsArea pkgIndex currentTime pkgDetails offset limit moreResults termsStr =
-            [ h2 << "Results"
-            , if offset == 0
-                then noHtml
-                else paragraph << ("(" ++ show (fst range + 1) ++ " to "
-                                       ++ show (snd range) ++ ")")
-            , case pkgDetails of
-                [] | offset == 0 -> toHtml "None"
-                   | otherwise   -> toHtml "No more results"
-                _ -> toHtml
-                      [ ulist ! [theclass "searchresults"]
-                             << map renderSearchResult pkgDetails
-                      , if null moreResults
-                          then noHtml
-                          else anchor ! [href moreResultsLink]
-                                     << "More results..."
-                      ]
-            ]
-          where
-            renderSearchResult :: PackageItem -> Html
-            renderSearchResult item = li ! classes <<
-              [ packageNameLink pkgname
-              , toHtml $ " " ++ ptype
-              , br
-              , toHtml (itemDesc item)
-              , br
-              , small ! [ theclass "info" ] <<
-                [ toHtml (renderTags (itemTags item))
-                , " Last uploaded " +++ humanTime ]
-              ]
-              where
-                pkgname   = itemName item
-                timestamp = maximum
-                          $ map pkgOriginalUploadTime
-                          $ PackageIndex.lookupPackageName pkgIndex pkgname
-                -- takes current time as argument so it can say how many $X ago something was
-                humanTime = HumanTime.humanReadableTime' currentTime timestamp
-                ptype = packageType (itemHasLibrary item) (itemNumExecutables item)
-                                    (itemNumTests item) (itemNumBenchmarks item)
-                classes = case classList of [] -> []; _ -> [theclass $ unwords classList]
-                classList = (case itemDeprecated item of Nothing -> []; _ -> ["deprecated"])
-
-            range = (offset, offset + length pkgDetails)
-            moreResultsLink =
-                "/packages/search?"
-             ++ "terms="   ++ escapeURIString isUnreserved termsStr
-             ++ "&offset=" ++ show (offset + limit)
-             ++ "&limit="  ++ show limit
-
         searchForm termsStr explain =
           [ h2 << "Package search"
           , form ! [XHtml.method "GET", action "/packages/search"] <<
@@ -1768,8 +1843,8 @@ mkHtmlSearch HtmlUtilities{..}
         resetParamsForm termsStr =
           let SearchRankParameters{..} = defaultSearchRankParameters in
           form ! [XHtml.method "GET", action "/packages/search"] <<
-            (concat $
-              [ input ! [ thetype "submit", value "Reset parameters" ]
+            concat
+             ([ input ! [ thetype "submit", value "Reset parameters" ]
               , input ! [ thetype "hidden", name "terms", value termsStr ]
               , input ! [ thetype "hidden", name "explain" ]
               , input ! [ thetype "hidden", name "k1", value (show paramK1) ] ]
@@ -1797,7 +1872,8 @@ mkHtmlSearch HtmlUtilities{..}
 
 {-------------------------------------------------------------------------------
   Groups
--------------------------------------------------------------------------------}
+------------------------------------------------------------------------------
+-}
 
 htmlGroupResource :: UserFeature -> GroupResource -> [Resource]
 htmlGroupResource UserFeature{..} r@(GroupResource groupR userR getGroup) =
@@ -1848,3 +1924,86 @@ htmlGroupResource UserFeature{..} r@(GroupResource groupR userR getGroup) =
         groupDeleteUser group dpath
         goToList dpath
     goToList dpath = seeOther (renderResource' (groupResource r) dpath) (toResponse ())
+
+{- Reverse Resource
+-}
+
+data HtmlReverse = HtmlReverse {
+    htmlReverseResource :: [Resource]
+  }
+
+mkHtmlReverse :: HtmlUtilities
+              -> CoreFeature
+              -> VersionsFeature
+              -> ListFeature
+              -> ReverseFeature
+              -> ReverseHtmlUtil
+              -> HtmlReverse
+mkHtmlReverse HtmlUtilities{..}
+           CoreFeature{ coreResource = CoreResource{
+                          packageInPath
+                        , lookupPackageName
+                        , corePackageIdUri
+                        , corePackageNameUri
+                        },
+                        queryGetPackageIndex
+                      }
+           VersionsFeature{withPackageVersion}
+           ListFeature{}
+           ReverseFeature{..}
+           ReverseHtmlUtil{..}
+           = HtmlReverse{..}
+  where
+    htmlReverseResource = [
+        (extendResource $ reversePackage reverseResource) {
+            resourceGet = [("html", serveReverse True)]
+          }
+      , (extendResource $ reversePackageOld reverseResource) {
+            resourceGet = [("html", serveReverse False)]
+          }
+      ,(extendResource $ reversePackageAll reverseResource) {
+            resourceGet = [("html", serveReverseFlat)]
+          }
+      , (extendResource $ reversePackageStats reverseResource) {
+            resourceGet = [("html", serveReverseStats)]
+          }
+      , (extendResource $ reversePackages reverseResource) {
+            resourceGet = [("html", serveReverseList)]
+          }
+      ]
+
+    serveReverse :: Bool -> DynamicPath -> ServerPartE Response
+    serveReverse isRecent dpath = do
+        pkgid <- packageInPath dpath
+        let pkgname = pkgName pkgid
+        rdisp <- case packageVersion pkgid of
+                  Version [] [] -> revPackageName pkgname
+                  _             -> withPackageVersion pkgid $ \_ -> revPackageId pkgid
+        render <- (if isRecent then renderReverseRecent else renderReverseOld) pkgname rdisp
+        return $ toResponse $ Resource.XHtml $ hackagePage (display pkgname ++ " - Reverse dependencies ") $
+            reversePackageRender pkgid (corePackageIdUri "") isRecent render
+
+    serveReverseFlat :: DynamicPath -> ServerPartE Response
+    serveReverseFlat dpath = do
+        pkg <- packageInPath dpath
+        let pkgname = pkgName pkg
+        revCount <- revPackageStats pkgname
+        pairs <- revPackageFlat pkgname
+        return $ toResponse $ Resource.XHtml $ hackagePage (display pkgname ++ "Flattened reverse dependencies") $
+            reverseFlatRender pkgname (corePackageNameUri "") revCount pairs
+
+    serveReverseStats :: DynamicPath -> ServerPartE Response
+    serveReverseStats dpath = do
+        pkg <- packageInPath dpath
+        let pkgname = pkgName pkg
+        pkgids <- lookupPackageName pkgname
+        revCount <- revPackageStats pkgname
+        return $ toResponse $ Resource.XHtml $ hackagePage (display pkgname ++ "Reverse dependency statistics") $
+            reverseStatsRender pkgname (map packageVersion pkgids) (corePackageIdUri "") revCount
+
+    serveReverseList :: DynamicPath -> ServerPartE Response
+    serveReverseList _ = do
+        triple <- revSummary
+        hackCount <- PackageIndex.indexSize <$> queryGetPackageIndex
+        return $ toResponse $ Resource.XHtml $ hackagePage "Reverse dependencies" $
+            reversePackagesRender (corePackageNameUri "") hackCount triple
diff --git a/Distribution/Server/Features/Html/HtmlUtilities.hs b/Distribution/Server/Features/Html/HtmlUtilities.hs
index cc35b96bf..e6132be16 100644
--- a/Distribution/Server/Features/Html/HtmlUtilities.hs
+++ b/Distribution/Server/Features/Html/HtmlUtilities.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE RecursiveDo, FlexibleContexts, RankNTypes, NamedFieldPuns, RecordWildCards #-}
+{-# LANGUAGE FlexibleContexts, RankNTypes, NamedFieldPuns, RecordWildCards #-}
 module Distribution.Server.Features.Html.HtmlUtilities (
   HtmlUtilities(..),
   htmlUtilities
@@ -9,22 +9,27 @@ import qualified Data.Set as Set
 import Distribution.Server.Features.Tags
 import Distribution.Server.Features.Core
 import Distribution.Text (display)
-import Data.List (intersperse)
+import Data.List (intersperse, intercalate)
 import Data.Set (Set)
 import Distribution.Server.Features.PackageList
 import Distribution.Server.Pages.Util (packageType)
 import Distribution.Package
+import Distribution.Server.Features.Users
 
 data HtmlUtilities = HtmlUtilities {
-    packageLink :: PackageId -> Html
-  , packageNameLink :: PackageName -> Html
-  , renderItem :: PackageItem -> Html
-  , renderTags :: Set Tag -> [Html]
+    packageLink      :: PackageId -> Html
+  , packageNameLink  :: PackageName -> Html
+  , renderItem       :: PackageItem -> Html
+  , makeRow          :: PackageItem -> Html
+  , renderTags       :: Set Tag -> [Html]
+  , renderReviewTags :: Set Tag -> (Set Tag, Set Tag) -> PackageName -> [Html]
+  , renderDeps :: PackageName -> ([PackageName], [PackageName]) -> Html
+  , renderPkgPageDeps :: ([PackageName], [PackageName]) -> Html
   }
 
-htmlUtilities :: CoreFeature -> TagsFeature -> HtmlUtilities
+htmlUtilities :: CoreFeature -> TagsFeature -> UserFeature -> HtmlUtilities
 htmlUtilities CoreFeature{coreResource}
-              TagsFeature{tagsResource} = HtmlUtilities{..}
+              TagsFeature{tagsResource} UserFeature{userResource} = HtmlUtilities{..}
   where
     packageLink :: PackageId -> Html
     packageLink pkgid = anchor ! [href $ corePackageIdUri cores "" pkgid] << display pkgid
@@ -32,6 +37,22 @@ htmlUtilities CoreFeature{coreResource}
     packageNameLink :: PackageName -> Html
     packageNameLink pkgname = anchor ! [href $ corePackageNameUri cores "" pkgname] << display pkgname
 
+    makeRow :: PackageItem -> Html
+    makeRow item = tr << [ td $ itemNameHtml
+                         , td $ toHtml $ show $ itemDownloads item
+                         , td $ toHtml $ show $ itemVotes item / 2
+                         , td $ toHtml $ show $ itemRevDepsCount item
+                         , td $ toHtml $ itemDesc item
+                         , td $ " (" +++ renderTags (itemTags item) +++ ")"
+                         , td $ "" +++ intersperse (toHtml ", ") (map renderUser (itemMaintainer item))
+                         ]
+        where
+            renderUser user = anchor ! [href $ userPageUri userResource "" user] << display user
+            itemNameHtml = packageNameLink (itemName item) +++
+                               case itemDeprecated item of
+                                       Just pkgs -> " (deprecated in favor of " +++ intersperse (toHtml ", ") (map packageNameLink pkgs) +++ ")"
+                                       Nothing -> toHtml ""
+
     renderItem :: PackageItem -> Html
     renderItem item = li ! classes <<
           [ packageNameLink pkgname
@@ -43,11 +64,48 @@ htmlUtilities CoreFeature{coreResource}
             ptype = packageType (itemHasLibrary item) (itemNumExecutables item)
                                 (itemNumTests item) (itemNumBenchmarks item)
             classes = case classList of [] -> []; _ -> [theclass $ unwords classList]
-            classList = (case itemDeprecated item of Nothing -> []; _ -> ["deprecated"])
+            classList = case itemDeprecated item of Nothing -> []; _ -> ["deprecated"]
 
     renderTags :: Set Tag -> [Html]
     renderTags tags = intersperse (toHtml ", ")
         (map (\tg -> anchor ! [href $ tagUri tagsResource "" tg] << display tg)
           $ Set.toList tags)
 
+    -- The page displayed at /package/:package/tags
+    renderReviewTags :: Set Tag -> (Set Tag, Set Tag) -> PackageName -> [Html]
+    renderReviewTags currTags revTags pkgname=
+        let toStr = intercalate ", " . map display . Set.toList
+            tagsStr = toStr currTags
+            addns = toStr $ fst revTags
+            delns = toStr $ snd revTags
+            disp = thediv ! [theclass "box"] << [ paragraph << [bold $ toHtml "Current Tags: ", toHtml tagsStr, br]
+                                                , paragraph << [bold $ toHtml "Additions to be reviewed: ", toHtml $ if (addns /= "") then addns else "None", br]
+                                                , paragraph << [bold $ toHtml "Deletions to be reviewed: ", toHtml $ if (delns /= "") then delns else "None", br]
+                                                ]
+        in
+            [ big $ bold $ toHtml $ display pkgname
+            , disp
+            , anchor ![href "tags/edit" ] << "Propose a tag?", toHtml " or "
+            , toHtml "return to ", packageNameLink pkgname, br
+            ]
+
+    renderPkgPageDeps :: ([PackageName], [PackageName])-> Html
+    renderPkgPageDeps (direct, indirect) =
+        map toHtml [show (length direct), " direct", ", ", show (length indirect), " indirect "] +++
+            thespan ! [thestyle "font-size: small", theclass "revdepdetails"]
+                << (" [" +++ anchor ! [href ""] << "details" +++ "]")
+
+    renderDeps :: PackageName -> ([PackageName], [PackageName])-> Html
+    renderDeps pkg (direct, indirect) =
+        (if null direct then (toHtml "") else summary "Direct" direct) +++
+        (if null indirect then (toHtml "") else summary "Indirect" indirect) +++
+        detailsLink
+      where
+        summary title_ dep = thediv << [ bold (toHtml title_), br
+                                     , p << intersperse (toHtml ", ") (map packageNameLink dep)
+                                     ]
+        detailsLink = thespan ! [thestyle "font-size: small"]
+                        << (" [" +++ anchor ! [href detailURL] << "details" +++ "]")
+        detailURL = "/package/" ++ unPackageName pkg ++ "/reverse"
+
     cores = coreResource
diff --git a/Distribution/Server/Features/PackageList.hs b/Distribution/Server/Features/PackageList.hs
index c9ac5d140..d3baacebe 100644
--- a/Distribution/Server/Features/PackageList.hs
+++ b/Distribution/Server/Features/PackageList.hs
@@ -9,22 +9,28 @@ module Distribution.Server.Features.PackageList (
 import Distribution.Server.Framework
 
 import Distribution.Server.Features.Core
--- [reverse index disabled] import Distribution.Server.Features.ReverseDependencies
+import Distribution.Server.Features.ReverseDependencies
+import Distribution.Server.Features.Votes
 import Distribution.Server.Features.DownloadCount
 import Distribution.Server.Features.Tags
+import Distribution.Server.Features.Users
+import Distribution.Server.Features.Upload(UploadFeature(..))
+import Distribution.Server.Users.Users
+import qualified Distribution.Server.Users.UserIdSet as UserIdSet
+import Distribution.Server.Users.Group(UserGroup(..), GroupDescription(..))
 import Distribution.Server.Features.PreferredVersions
 import qualified Distribution.Server.Packages.PackageIndex as PackageIndex
 import Distribution.Server.Util.CountingMap (cmFind)
 
 import Distribution.Server.Packages.Types
--- [reverse index disabled] import Distribution.Server.Packages.Reverse
+import Distribution.Server.Users.Types
 
 import Distribution.Package
 import Distribution.PackageDescription
 import Distribution.PackageDescription.Configuration
 
 import Control.Concurrent
-import Data.Maybe (catMaybes)
+import Data.Maybe (mapMaybe)
 import Data.Map (Map)
 import qualified Data.Map as Map
 import Data.Set (Set)
@@ -55,14 +61,18 @@ data PackageItem = PackageItem {
     itemDeprecated :: !(Maybe [PackageName]),
     -- The description of the package from its Cabal file
     itemDesc :: !String,
+    -- Maintainer of the package
+    itemMaintainer :: [UserName],
     -- Whether the item is in the Haskell Platform
-  --itemPlatform :: Bool,
+    -- itemPlatform :: Bool,
+    -- Number of votes for the package
+    itemVotes :: !Float,
     -- The total number of downloads. (For sorting, not displaying.)
     -- Updated periodically.
     itemDownloads :: !Int,
     -- The number of direct revdeps. (Likewise.)
     -- also: distinguish direct/flat?
-    -- [reverse index disabled] itemRevDepsCount :: !Int,
+    itemRevDepsCount :: !Int,
     -- Whether there's a library here.
     itemHasLibrary :: !Bool,
     -- How many executables (>=0) this package has.
@@ -70,58 +80,79 @@ data PackageItem = PackageItem {
     -- How many test suites (>=0) this package has.
     itemNumTests :: !Int,
     -- How many benchmarks (>=0) this package has.
-    itemNumBenchmarks :: !Int
-    -- Hotness: a more heuristic way to sort packages. presently non-existent.
-  --itemHotness :: Int
+    itemNumBenchmarks :: !Int,
+    -- Hotness: a more heuristic way to sort packages
+    -- Hotness = recent downloads + stars + 2 * no rev deps
+    itemHotness :: !Float
 }
 
 instance MemSize PackageItem where
-    memSize (PackageItem a b c d e f g h i) = memSize9 a b c d e f g h i
+    memSize (PackageItem a b c d e f g h i j k l m) = memSize13 a b c d e f g h i j k l m
 
 
 emptyPackageItem :: PackageName -> PackageItem
-emptyPackageItem pkg = PackageItem pkg Set.empty Nothing "" 0
-                                   -- [reverse index disabled] 0
-                                   False 0 0 0
-
+emptyPackageItem pkg = PackageItem pkg Set.empty Nothing "" []
+                                   0 0 0 False 0 0 0 0
 
 initListFeature :: ServerEnv
                 -> IO (CoreFeature
-                    -- [reverse index disabled] -> ReverseFeature
+                    -> ReverseFeature
                     -> DownloadFeature
+                    -> VotesFeature
                     -> TagsFeature
                     -> VersionsFeature
+                    -> UserFeature
+                    -> UploadFeature
                     -> IO ListFeature)
 initListFeature _env = do
     itemCache  <- newMemStateWHNF Map.empty
     itemUpdate <- newHook
 
     return $ \core@CoreFeature{..}
-              -- [reverse index disabled] revs
+              revs@ReverseFeature{..}
               download
+              votesf@VotesFeature{..}
               tagsf@TagsFeature{..}
-              versions@VersionsFeature{..} -> do
+              versions@VersionsFeature{..}
+              users@UserFeature{..}
+              uploads@UploadFeature{..} -> do
 
       let (feature, modifyItem, updateDesc) =
-            listFeature core download tagsf versions
+            listFeature core revs download votesf tagsf versions users uploads
                         itemCache itemUpdate
 
       registerHookJust packageChangeHook isPackageChangeAny $ \(pkgid, _) ->
         updateDesc (packageName pkgid)
 
-      {- [reverse index disabled]
-      registerHook (reverseUpdateHook revs) $ \mrev -> do
-          let pkgs = Map.keys mrev
+      registerHook groupChangedHook $ \(gd,_,_,_,_) ->
+         case fmap (PackageName . fst) (groupEntity gd) of
+              Just pkgname -> do
+                   maintainers <- queryUserGroup (maintainersGroup pkgname)
+                   users <- queryGetUserDb
+                   modifyItem pkgname (\x -> x {itemMaintainer = map (userIdToName users) (UserIdSet.toList maintainers)})
+                   runHook_ itemUpdate (Set.singleton pkgname)
+              Nothing -> return ()
+
+
+      registerHook reverseHook $ \pkgids -> do
+          let pkgs = map pkgName pkgids
           forM_ pkgs $ \pkgname -> do
-              revCount <- query . GetReverseCount $ pkgname
+              revCount <- revPackageStats pkgname
               modifyItem pkgname (updateReverseItem revCount)
-          runHook' itemUpdate $ Set.fromDistinctAscList pkgs
-      -}
+          runHook_ itemUpdate $ Set.fromDistinctAscList pkgs
+
+
+      registerHook votesUpdated $ \(pkgname, _) -> do
+          votes <- pkgNumScore pkgname
+          modifyItem pkgname (updateVoteItem votes)
+          runHook_ itemUpdate (Set.singleton pkgname)
+
       registerHook tagsUpdated $ \(pkgs, _) -> do
           forM_ (Set.toList pkgs) $ \pkgname -> do
               tags <- queryTagsForPackage pkgname
               modifyItem pkgname (updateTagItem tags)
           runHook_ itemUpdate pkgs
+
       registerHook deprecatedHook $ \(pkgname, mpkgs) -> do
           modifyItem pkgname (updateDeprecation mpkgs)
           runHook_ itemUpdate (Set.singleton pkgname)
@@ -130,9 +161,13 @@ initListFeature _env = do
 
 
 listFeature :: CoreFeature
+            -> ReverseFeature
             -> DownloadFeature
+            -> VotesFeature
             -> TagsFeature
             -> VersionsFeature
+            -> UserFeature
+            -> UploadFeature
             -> MemState (Map PackageName PackageItem)
             -> Hook (Set PackageName) ()
             -> (ListFeature,
@@ -140,7 +175,7 @@ listFeature :: CoreFeature
                 PackageName -> IO ())
 
 listFeature CoreFeature{..}
-            DownloadFeature{..} TagsFeature{..} VersionsFeature{..}
+            ReverseFeature{..} DownloadFeature{..} VotesFeature{..} TagsFeature{..} VersionsFeature{..} UserFeature{..} UploadFeature{..}
             itemCache itemUpdate
   = (ListFeature{..}, modifyItem, updateDesc)
   where
@@ -165,14 +200,13 @@ listFeature CoreFeature{..}
 
     modifyItem pkgname token = do
         hasItem <- fmap (Map.member pkgname) $ readMemState itemCache
-        case hasItem of
-            True  -> modifyMemState itemCache $ Map.adjust token pkgname
-            False -> do
-                index <- queryGetPackageIndex
-                let pkgs = PackageIndex.lookupPackageName index pkgname
-                case pkgs of
-                    [] -> return () --this shouldn't happen
-                    _  -> modifyMemState itemCache . uncurry Map.insert =<< constructItem (last pkgs)
+        if hasItem then modifyMemState itemCache $ Map.adjust token pkgname
+                   else (do
+                           index <- queryGetPackageIndex
+                           let pkgs = PackageIndex.lookupPackageName index pkgname
+                           case pkgs of
+                               [] -> return () --this shouldn't happen
+                               _  -> modifyMemState itemCache . uncurry Map.insert =<< constructItem (last pkgs))
     updateDesc pkgname = do
         index <- queryGetPackageIndex
         let pkgs = PackageIndex.lookupPackageName index pkgname
@@ -198,22 +232,29 @@ listFeature CoreFeature{..}
     constructItem :: PkgInfo -> IO (PackageName, PackageItem)
     constructItem pkg = do
         let pkgname = packageName pkg
-        -- [reverse index disabled] revCount <- query . GetReverseCount $ pkgname
+        users <- queryGetUserDb
+        revCount <- revPackageStats pkgname
         tags  <- queryTagsForPackage pkgname
         downs <- recentPackageDownloads
+        votes <- pkgNumScore pkgname
         deprs <- queryGetDeprecatedFor pkgname
+        maintainers <- queryUserGroup (maintainersGroup pkgname)
+
         return $ (,) pkgname $ (updateDescriptionItem (pkgDesc pkg) $ emptyPackageItem pkgname) {
             itemTags       = tags
+          , itemMaintainer = map (userIdToName users) (UserIdSet.toList maintainers)
           , itemDeprecated = deprs
           , itemDownloads  = cmFind pkgname downs
-            -- [reverse index disabled] , itemRevDepsCount = directReverseCount revCount
+          , itemVotes = votes
+          , itemRevDepsCount = directCount revCount
+          , itemHotness = votes + fromIntegral (cmFind pkgname downs) + fromIntegral (directCount revCount)*2
           }
 
     ------------------------------
     makeItemList :: [PackageName] -> IO [PackageItem]
     makeItemList pkgnames = do
         mainMap <- readMemState itemCache
-        return $ catMaybes $ map (flip Map.lookup mainMap) pkgnames
+        return $ mapMaybe (`Map.lookup` mainMap) pkgnames
 
     makeItemMap :: Map PackageName a -> IO (Map PackageName (PackageItem, a))
     makeItemMap pkgmap = do
@@ -234,6 +275,7 @@ updateDescriptionItem genDesc item =
         -- This checks if the library is buildable. However, since
         -- desc is flattened, we might miss some flags. Perhaps use the
         -- CondTree instead.
+        -- itemMaintainer = maintainer desc,
         itemHasLibrary = hasLibs desc,
         itemNumExecutables = length . filter (buildable . buildInfo) $ executables desc,
         itemNumTests = length . filter (buildable . testBuildInfo) $ testSuites desc,
@@ -246,22 +288,29 @@ updateTagItem tags item =
         itemTags = tags
     }
 
+updateVoteItem :: Float -> PackageItem -> PackageItem
+updateVoteItem score item =
+    item {
+        itemVotes = score,
+        itemHotness = score + fromIntegral (itemDownloads item) + fromIntegral (itemRevDepsCount item)*2
+    }
+
 updateDeprecation :: Maybe [PackageName] -> PackageItem -> PackageItem
 updateDeprecation pkgs item =
     item {
         itemDeprecated = pkgs
     }
 
-{- [reverse index disabled]
 updateReverseItem :: ReverseCount -> PackageItem -> PackageItem
 updateReverseItem revCount item =
     item {
-        itemRevDepsCount = directReverseCount revCount
+        itemRevDepsCount = directCount revCount,
+        itemHotness = fromIntegral (directCount revCount)*2 + itemVotes item + fromIntegral (itemDownloads item)
     }
--}
 
 updateDownload :: Int -> PackageItem -> PackageItem
 updateDownload count item =
     item {
-        itemDownloads = count
+        itemDownloads = count,
+        itemHotness = fromIntegral count + itemVotes item + fromIntegral (itemRevDepsCount item)*2
     }
diff --git a/Distribution/Server/Features/PreferredVersions.hs b/Distribution/Server/Features/PreferredVersions.hs
index 4a7039e0e..9833e4262 100644
--- a/Distribution/Server/Features/PreferredVersions.hs
+++ b/Distribution/Server/Features/PreferredVersions.hs
@@ -46,7 +46,7 @@ data VersionsFeature = VersionsFeature {
 
     queryGetPreferredInfo :: forall m. MonadIO m => PackageName -> m PreferredInfo,
     queryGetDeprecatedFor :: forall m. MonadIO m => PackageName -> m (Maybe [PackageName]),
-
+    queryGetPreferredVersions :: forall m. MonadIO m => m PreferredVersions,
     versionsResource :: VersionsResource,
     deprecatedHook :: Hook (PackageName, Maybe [PackageName]) (),
     putDeprecated :: PackageName -> ServerPartE Bool,
@@ -59,6 +59,7 @@ data VersionsFeature = VersionsFeature {
     doDeprecatedsRender   :: forall m. MonadIO m => m [(PackageName, [PackageName])],
 
     withPackagePreferred     :: forall a. PackageId -> (PkgInfo -> [PkgInfo] -> ServerPartE a) -> ServerPartE a,
+    withPackageVersion :: forall a. PackageId -> (PkgInfo -> ServerPartE a) -> ServerPartE a,
     withPackagePreferredPath :: forall a. DynamicPath -> (PkgInfo -> [PkgInfo] -> ServerPartE a) -> ServerPartE a
 }
 
@@ -151,6 +152,9 @@ versionsFeature ServerEnv{ serverVerbosity = verbosity }
     queryGetDeprecatedFor :: MonadIO m => PackageName -> m (Maybe [PackageName])
     queryGetDeprecatedFor name = queryState preferredState (GetDeprecatedFor name)
 
+    queryGetPreferredVersions :: MonadIO m => m PreferredVersions
+    queryGetPreferredVersions = queryState preferredState GetPreferredVersions
+
     updateDeprecatedTags = do
       pkgs <- deprecatedMap <$> queryState preferredState GetPreferredVersions
       setCalculatedTag (Tag "deprecated") (Map.keysSet pkgs)
@@ -264,7 +268,7 @@ versionsFeature ServerEnv{ serverVerbosity = verbosity }
     withPackagePreferred pkgid func = do
       pkgIndex <- queryGetPackageIndex
       case PackageIndex.lookupPackageName pkgIndex (packageName pkgid) of
-            []   ->  packageError [MText "No such package in package index"]
+            []   ->  packageError [MText $ "No such package in package index. ", MLink "Search for related terms instead?" $ "/packages/search?terms=" ++ (display $ pkgName pkgid)]
             pkgs  | pkgVersion pkgid == Version [] [] -> queryState preferredState (GetPreferredInfo $ packageName pkgid) >>= \info -> do
                 let rangeToCheck = sumRange info
                 case maybe id (\r -> filter (flip withinRange r . packageVersion)) rangeToCheck pkgs of
@@ -277,6 +281,17 @@ versionsFeature ServerEnv{ serverVerbosity = verbosity }
                 Just pkg -> func pkg pkgs
       where packageError = errNotFound "Package not found"
 
+    withPackageVersion :: PackageId -> (PkgInfo -> ServerPartE a) -> ServerPartE a
+    withPackageVersion pkgid func = do
+        pkgIndex <- queryGetPackageIndex
+        guard (packageVersion pkgid /= Version [] [])
+        case PackageIndex.lookupPackageName pkgIndex (packageName pkgid) of
+            []   ->  packageError [MText $ "No such package in package index. ", MLink "Search for related terms instead?" $ "/packages/search?terms=" ++ (display $ pkgName pkgid)]
+            pkg -> case find ((== packageVersion pkgid) . packageVersion) pkg of
+                Nothing  -> packageError [MText $ "No such package version for " ++ display (packageName pkgid)]
+                Just pkg' -> func pkg'
+      where packageError = errNotFound "Package not found"
+
     withPackagePreferredPath :: DynamicPath -> (PkgInfo -> [PkgInfo] -> ServerPartE a) -> ServerPartE a
     withPackagePreferredPath dpath func = do
       pkgid <- packageInPath dpath
diff --git a/Distribution/Server/Features/ReverseDependencies.hs b/Distribution/Server/Features/ReverseDependencies.hs
index dbd100bbc..35ff18979 100644
--- a/Distribution/Server/Features/ReverseDependencies.hs
+++ b/Distribution/Server/Features/ReverseDependencies.hs
@@ -1,61 +1,61 @@
-{-# LANGUAGE RankNTypes, NamedFieldPuns, RecordWildCards #-}
+{-# LANGUAGE DeriveGeneric, RankNTypes, NamedFieldPuns, RecordWildCards #-}
 module Distribution.Server.Features.ReverseDependencies (
-    ReverseFeature,
-    reverseResource,
+    ReverseFeature(..),
+    ReverseCount(..),
     ReverseResource(..),
-    reverseUpdateHook,
     initReverseFeature,
     ReverseRender(..),
     ReversePageRender(..),
-    revPackageId,
-    revPackageName,
-    renderReverseRecent,
-    renderReverseOld,
-    revPackageFlat,
-    revPackageStats,
-    revPackageSummary,
-    revSummary,
-    sortedRevSummary
   ) where
 
-import Distribution.Server.Acid (query, update)
 import Distribution.Server.Framework
-import Distribution.Server.Framework.BackupRestore
-import Distribution.Server.Framework.BackupDump (testRoundtripByQuery)
 import Distribution.Server.Features.Core
 import Distribution.Server.Features.PreferredVersions
+import Distribution.Server.Packages.PackageIndex (packageNames, allPackagesByName)
+import Distribution.Server.Packages.Types (pkgInfoId)
 
-import Distribution.Server.Packages.State
-import Distribution.Server.Packages.Reverse
-import Distribution.Server.Packages.Preferred
-import qualified Distribution.Server.Framework.Cache as Cache
+import Distribution.Server.Features.ReverseDependencies.State
 
 import Distribution.Package
 import Distribution.Text (display)
-import Distribution.Version
 
 import Data.List (mapAccumL, sortBy)
-import Data.Maybe (catMaybes)
-import Data.Function (fix, on)
-import Data.Map (Map)
+import Data.Maybe (catMaybes, fromJust)
+import Data.Function (fix)
+import qualified Data.Bimap as Bimap
+import qualified Data.Array as Arr
+import qualified Data.Graph as Gr
 import qualified Data.Map as Map
 import qualified Data.Set as Set
 import Control.Monad (liftM, forever)
 import Control.Monad.Trans (MonadIO)
-import Control.Concurrent (forkIO)
-import Control.Concurrent.Chan
+import Data.Aeson
+import GHC.Generics hiding (packageName)
+import Data.ByteString.Lazy (ByteString)
 
 data ReverseFeature = ReverseFeature {
     reverseFeatureInterface :: HackageFeature,
 
     reverseResource :: ReverseResource,
-    reverseUpdateHook :: Hook (Map PackageName [Version] -> IO ()),
+
+    reverseHook :: Hook [PackageId] (),
+
+    queryReverseIndex :: forall m. MonadIO m => m ReverseIndex,
+    queryReverseDeps :: forall m. MonadIO m => PackageName -> m ([PackageName], [PackageName]),
+    revPackageId :: forall m. MonadIO m => PackageId -> m ReverseDisplay,
+    revPackageName :: forall m. MonadIO m => PackageName -> m ReverseDisplay,
+    renderReverseRecent :: forall m. (Functor m, MonadIO m) => PackageName -> ReverseDisplay -> m ReversePageRender,
+    renderReverseOld :: forall m. (Functor m, MonadIO m) => PackageName -> ReverseDisplay -> m ReversePageRender,
+    revPackageFlat :: forall m. (Functor m, MonadIO m) => PackageName -> m [(PackageName, Int)],
+    revPackageStats :: forall m. (Functor m, MonadIO m) => PackageName -> m ReverseCount,
+    revPackageSummary :: forall m. (Functor m, MonadIO m) => PackageId -> m (Int, Int),
+    revSummary :: forall m. (Functor m, MonadIO m) => m [(PackageName, Int, Int)],
+    revJSON :: forall m. MonadIO m => m ByteString
 }
 
 instance IsHackageFeature ReverseFeature where
     getFeatureInterface = reverseFeatureInterface
 
-
 data ReverseResource = ReverseResource {
     reversePackage :: Resource,
     reversePackageOld :: Resource,
@@ -77,69 +77,91 @@ data ReverseResource = ReverseResource {
 
 initReverseFeature :: ServerEnv
                    -> IO (CoreFeature
+                       -> VersionsFeature
                        -> IO ReverseFeature)
-initReverseFeature ServerEnv{serverVerbosity = verbosity} = do
-    revChan <- newChan
-    registerHook (packageAddHook core) $ \pkg -> writeChan revChan $
-        update $ AddReversePackage (packageId pkg) (getAllDependencies pkg)
-    registerHook (packageRemoveHook core) $ \pkg -> writeChan revChan $
-        update $ RemoveReversePackage (packageId pkg) (getAllDependencies pkg)
-    registerHook (packageChangeHook core) $ \pkg pkg' -> writeChan revChan $
-        update $ ChangeReversePackage (packageId pkg)
-                    (getAllDependencies pkg) (getAllDependencies pkg')
-
-    revHook <- newHook
-    let select (_, b, _) = b
-        sortedRevs = fmap (sortBy $ on (flip compare) select) revSummary
-    revTopCache <- Cache.newCacheable =<< sortedRevs
-    registerHook revHook $ \_ -> Cache.putCache revTopCache =<< sortedRevs
-
-    return $ \core -> do
-      let feature = reverseFeature core
-                       revChan revHook revTopCache
+initReverseFeature _ = do
+    updateReverse <- newHook
+
+    return $ \core@CoreFeature{..}
+             versionsf@VersionsFeature{..} -> do
+      idx <- queryGetPackageIndex
+      memState <- newMemStateWHNF (constructReverseIndex idx)
+
+      let feature = reverseFeature core versionsf memState updateReverse
+
+      registerHookJust packageChangeHook isPackageChangeAny $ \(pkgid, mpkginfo) ->
+        case mpkginfo of
+            Nothing -> return () --PackageRemoveHook
+            Just pkginfo -> do
+                index <- queryGetPackageIndex
+                modifyMemState memState (addPackage pkgid (getAllDependencies pkginfo index))
+                runHook_ updateReverse [pkgid]
 
       return feature
 
+data ReverseRender = ReverseRender {
+    rendRevPkg :: PackageId,
+    rendRevStatus :: Maybe VersionStatus,
+    rendRevCount :: Int
+} deriving (Show, Eq, Ord)
+
+data ReversePageRender = ReversePageRender {
+    rendRevList :: [ReverseRender],
+    rendFilterCount :: (Int, Int),
+    rendPageTotal :: Int
+}
+
+-- data Node = Node {id::Int, label::String} deriving Generic
+data Edge = Edge {
+    id::Int,
+    name::String,
+    deps::[String]
+    } deriving Generic
+-- data JGraph = JGraph { nodes::[Node], edges::[Edge]} deriving Generic
+-- instance ToJSON Node
+instance ToJSON Edge
+-- instance ToJSON JGraph
+-- instance ToJSON PackageName
+
 reverseFeature :: CoreFeature
-               -> Chan (IO (Map PackageName [Version]))
-               -> Hook (Map PackageName [Version] -> IO ())
-               -> Cache.Cache [(PackageName, Int, Int)]
+               -> VersionsFeature
+               -> MemState ReverseIndex
+               -> Hook [PackageId] ()
                -> ReverseFeature
 
 reverseFeature CoreFeature{..}
-               reverseStream reverseUpdateHook reverseTopCache
+               VersionsFeature{..}
+               reverseMemState
+               reverseHook
   = ReverseFeature{..}
   where
     reverseFeatureInterface = (emptyHackageFeature "reverse") {
-        featureResources = map ($reverseResource) []
-      , featurePostInit = forkIO transferReverse >> return ()
-      , featureDumpRestore = Just (return [], restoreBackup, testRoundtripByQuery (query GetReverseIndex))
+        featureResources = map ($ reverseResource) []
+      , featurePostInit  = initReverseIndex
+      , featureState     = []
+      , featureCaches    = [
+              CacheComponent {
+                     cacheDesc       = "reverse index",
+                     getCacheMemSize = memSize <$> readMemState reverseMemState
+               }
+             ]
       }
 
-    transferReverse = forever $ do
-            revFunc <- readChan reverseStream
-            modded  <- revFunc
-            runHook' reverseUpdateHook modded
-
-    --TODO: this isn't a restore!
-    --      do we need a post init/restore hook for initialising caches?
-    restoreBackup = RestoreBackup
-          { restoreEntry    = \_ -> return $ Right restoreBackup
-          , restoreFinalize = return $ Right restoreBackup
-          , restoreComplete = do
-                putStrLn "Calculating reverse dependencies"
-                index <- fmap packageList $ query GetPackagesState
-                let revs = constructReverseIndex index
-                update $ ReplaceReverseIndex revs
-          }
+    initReverseIndex :: IO ()
+    initReverseIndex = do
+            index <- queryGetPackageIndex
+            -- We build the proper index earlier, this just fires the reverse hooks
+            let allPackages = map pkgInfoId $ concat $ allPackagesByName index
+            runHook_ reverseHook allPackages
+
 
     reverseResource = fix $ \r -> ReverseResource
-          { reversePackage = resourceAt ("/package/:package/reverse.:format")
-          , reversePackageOld = resourceAt ("/package/:package/reverse/old.:format")
-          , reversePackageAll = resourceAt ("/package/:package/reverse/all.:format")
-          , reversePackageStats = resourceAt ("/package/:package/reverse/summary.:format")
-          , reversePackages = resourceAt ("/packages/reverse.:format")
-          , reversePackagesAll = resourceAt ("/packages/reverse/all.:format")
+          { reversePackage = resourceAt "/package/:package/reverse.:format"
+          , reversePackageOld = resourceAt "/package/:package/reverse/old.:format"
+          , reversePackageAll = resourceAt "/package/:package/reverse/all.:format"
+          , reversePackageStats = resourceAt "/package/:package/reverse/summary.:format"
+          , reversePackages = resourceAt "/packages/reverse.:format"
+          , reversePackagesAll = resourceAt "/packages/reverse/all.:format"
 
           , reverseUri = \format pkg -> renderResource (reversePackage r) [display pkg, format]
           , reverseNameUri = \format pkg -> renderResource (reversePackage r) [display pkg, format]
@@ -154,95 +176,102 @@ reverseFeature CoreFeature{..}
     --textRevDisplay :: ReverseDisplay -> String
     --textRevDisplay m = unlines . map (\(n, (v, m)) -> display n ++ "-" ++ display v ++ ": " ++ show m) . Map.toList $ m
 
--- If VersionStatus caching is used, revPackageId and revPackageName could be
--- reduced to a single map lookup (see Distribution.Server.Packages.Reverse).
-revPackageId :: MonadIO m => PackageId -> m ReverseDisplay
-revPackageId pkgid = do
-    dispInfo <- revDisplayInfo
-    revs <- liftM reverseDependencies $ query GetReverseIndex
-    return $ perVersionReverse dispInfo revs pkgid
-
-revPackageName :: MonadIO m => PackageName -> m ReverseDisplay
-revPackageName pkgname = do
-    dispInfo <- revDisplayInfo
-    revs <- liftM reverseDependencies $ query GetReverseIndex
-    return $ perPackageReverse dispInfo revs pkgname
-
-revDisplayInfo :: MonadIO m => m VersionIndex
-revDisplayInfo = do
-    pkgIndex <- liftM packageList $ query GetPackagesState
-    prefs <- query GetPreferredVersions
-    return $ getDisplayInfo prefs pkgIndex
-
-data ReverseRender = ReverseRender {
-    rendRevPkg :: PackageId,
-    rendRevStatus :: Maybe VersionStatus,
-    rendRevCount :: Int
-} deriving (Show, Eq, Ord)
-
-data ReversePageRender = ReversePageRender {
-    rendRevList :: [ReverseRender],
-    rendFilterCount :: (Int, Int),
-    rendPageTotal :: Int
-}
-
-renderReverseWith :: MonadIO m => PackageName -> ReverseDisplay -> (Maybe VersionStatus -> Bool) -> m ReversePageRender
-renderReverseWith pkg rev filterFunc = do
-    counts <- liftM reverseCount $ query GetReverseIndex
-    let toRender (i, i') (pkgname, (version, status)) = case filterFunc status of
-            False -> (,) (i, i'+1) Nothing
-            True  -> (,) (i+1, i') $ Just $ ReverseRender {
-                rendRevPkg = PackageIdentifier pkgname version,
-                rendRevStatus = status,
-                rendRevCount = maybe 0 directReverseCount $ Map.lookup pkgname counts
-            }
-        (res, rlist) = mapAccumL toRender (0, 0) (Map.toList rev)
-        pkgCount = maybe 0 directReverseCount $ Map.lookup pkg counts
-    return $ ReversePageRender (catMaybes rlist) res pkgCount
-
-renderReverseRecent :: MonadIO m => PackageName -> ReverseDisplay -> m ReversePageRender
-renderReverseRecent pkg rev = renderReverseWith pkg rev $ \status -> case status of
-    Just DeprecatedVersion -> False
-    Nothing -> False
-    _ -> True
-
-renderReverseOld :: MonadIO m => PackageName -> ReverseDisplay -> m ReversePageRender
-renderReverseOld pkg rev = renderReverseWith pkg rev $ \status -> case status of
-    Just DeprecatedVersion -> True
-    Nothing -> True
-    _ -> False
-
--- This could also differentiate between direct and indirect dependencies
--- with a bit more calculation.
-revPackageFlat :: MonadIO m => PackageName -> m [(PackageName, Int)]
-revPackageFlat pkgname = do
-    index <- query GetReverseIndex
-    let counts = reverseCount index
-        count pkg = maybe 0 flattenedReverseCount $ Map.lookup pkg counts
-        pkgs = maybe [] Set.toList $ Map.lookup pkgname $ flattenedReverse index
-    return $ map (\pkg -> (pkg, count pkg)) pkgs
-
-revPackageStats :: MonadIO m => PackageName -> m ReverseCount
-revPackageStats = query . GetReverseCount
-
-revPackageSummary :: MonadIO m => PackageId -> m (Int, Int)
-revPackageSummary (PackageIdentifier pkgname version) = do
-    ReverseCount direct _ versions <- revPackageStats pkgname
-    return (direct, Map.findWithDefault 0 version versions)
-
--- This returns a list of (package name, direct dependencies, flat dependencies)
--- for all packages. An interesting fact: it even does so for packages which
--- don't exist in the index, except the latter two fields are always zero. This is
--- because no versions of these packages exist, so the union of no versions is
--- still no versions. TODO: use this fact to make an index of dependencies which
--- are not in Hackage at all, which might be useful for fixing accidentally
--- broken packages.
-revSummary :: MonadIO m => m [(PackageName, Int, Int)]
-revSummary = do
-    counts <- liftM reverseCount $ query GetReverseIndex
-    return $ map (\(pkg, ReverseCount direct flat _) -> (pkg, direct, flat)) $ Map.toList counts
-
-sortedRevSummary :: MonadIO m => ReverseFeature -> m [(PackageName, Int, Int)]
-sortedRevSummary revs = Cache.getCache $ reverseTopCache revs
-
-
+    -- If VersionStatus caching is used, revPackageId and revPackageName could be
+    -- reduced to a single map lookup (see Distribution.Server.Packages.Reverse).
+    queryReverseIndex :: MonadIO m => m ReverseIndex
+    queryReverseIndex = readMemState reverseMemState
+
+    queryReverseDeps :: MonadIO m => PackageName -> m ([PackageName], [PackageName])
+    queryReverseDeps pkgname = do
+        pkgIndex <- queryGetPackageIndex
+        ms <- readMemState reverseMemState
+        let rdeps = getDependencies' pkgname pkgIndex ms
+            rdepsall = getDependenciesI' pkgname pkgIndex ms
+            indirect = Set.difference rdepsall rdeps
+        return (Set.toList rdeps, Set.toList indirect)
+
+    revPackageId :: MonadIO m => PackageId -> m ReverseDisplay
+    revPackageId pkgid = do
+        dispInfo <- revDisplayInfo
+        revs <- queryReverseIndex
+        return $ perVersionReverse dispInfo revs pkgid
+
+    revPackageName :: MonadIO m => PackageName -> m ReverseDisplay
+    revPackageName pkgname = do
+        dispInfo <- revDisplayInfo
+        pkgIndex <- queryGetPackageIndex
+        revs <- queryReverseIndex
+        return $ perPackageReverse dispInfo pkgIndex revs pkgname
+
+    revJSON :: MonadIO m => m ByteString
+    revJSON = do
+        ReverseIndex revdeps nodemap <- queryReverseIndex
+        let assoc = takeWhile (\(a,_) -> a < Bimap.size nodemap) $ Arr.assocs . Gr.transposeG $ revdeps
+            nodeToString node = unPackageName (packageName (nodemap Bimap.!> node))
+            -- nodes = map (uncurry Node) $ map (\n -> (fst n, nodeToString (fst n))) assoc
+            edges = map (\(a,b) -> Edge a (nodeToString a) (map (\x-> nodeToString x) b)) assoc
+        return $ encode edges
+
+    revDisplayInfo :: MonadIO m => m VersionIndex
+    revDisplayInfo = do
+        pkgIndex <- queryGetPackageIndex
+        prefs <- queryGetPreferredVersions
+        return $ getDisplayInfo prefs pkgIndex
+
+    renderReverseWith :: (Functor m, MonadIO m) => PackageName -> ReverseDisplay -> (Maybe VersionStatus -> Bool) -> m ReversePageRender
+    renderReverseWith pkg rev filterFunc = do
+        let rev' = map fst $ Map.toList rev
+        revcount <- mapM revPackageStats (pkg:rev')
+        let counts = zip (pkg:rev') (map directCount revcount)
+            toRender (i, i') (pkgname, (version, status)) = if filterFunc status then (,) (i+1, i') $ Just ReverseRender {
+                                                                rendRevPkg = PackageIdentifier pkgname version,
+                                                                rendRevStatus = status,
+                                                                rendRevCount = fromJust $ lookup pkgname counts
+                                                            } else (,) (i, i'+1) Nothing
+            (res, rlist) = mapAccumL toRender (0, 0) (Map.toList rev)
+            pkgCount = fromJust $ lookup pkg counts
+        return $ ReversePageRender (catMaybes rlist) res pkgCount
+
+    renderReverseRecent :: (Functor m, MonadIO m) => PackageName -> ReverseDisplay -> m ReversePageRender
+    renderReverseRecent pkg rev = renderReverseWith pkg rev $ \status -> case status of
+        Just DeprecatedVersion -> False
+        Nothing -> False
+        _ -> True
+
+    renderReverseOld :: (Functor m, MonadIO m) => PackageName -> ReverseDisplay -> m ReversePageRender
+    renderReverseOld pkg rev = renderReverseWith pkg rev $ \status -> case status of
+        Just DeprecatedVersion -> True
+        Nothing -> True
+        _ -> False
+
+    -- -- This could also differentiate between direct and indirect dependencies
+    -- -- with a bit more calculation.
+    revPackageFlat :: (Functor m, MonadIO m) => PackageName -> m [(PackageName, Int)]
+    revPackageFlat pkgname = do
+        pkgIndex <- queryGetPackageIndex
+        deps <- getDependenciesI' pkgname pkgIndex <$> readMemState reverseMemState
+        counts <- mapM revPackageStats $ Set.toList deps
+        return $ zip (Set.toList deps) (map totalCount counts)
+
+    revPackageStats :: (Functor m, MonadIO m) => PackageName -> m ReverseCount
+    revPackageStats pkgname = do
+            pkgIndex <- queryGetPackageIndex
+            getReverseCount' pkgname pkgIndex <$> readMemState reverseMemState
+
+    revPackageSummary :: (Functor m, MonadIO m) => PackageId -> m (Int, Int)
+    revPackageSummary pkg = getReverseCountId' pkg <$> readMemState reverseMemState
+
+    -- -- This returns a list of (package name, direct dependencies, flat dependencies)
+    -- -- for all packages. An interesting fact: it even does so for packages which
+    -- -- don't exist in the index, except the latter two fields are always zero. This is
+    -- -- because no versions of these packages exist, so the union of no versions is
+    -- -- still no versions. TODO: use this fact to make an index of dependencies which
+    -- -- are not in Hackage at all, which might be useful for fixing accidentally
+    -- -- broken packages.
+    revSummary :: (Functor m, MonadIO m) => m [(PackageName, Int, Int)]
+    revSummary = do
+        index <- queryGetPackageIndex
+        let pkgnames = packageNames index
+            util = sortBy (\(_,d1,_) (_,d2,_) -> compare d1 d2)
+        counts <- mapM revPackageStats pkgnames
+        return $ util $ zip3 pkgnames (map directCount counts) (map totalCount counts)
diff --git a/Distribution/Server/Features/ReverseDependencies/State.hs b/Distribution/Server/Features/ReverseDependencies/State.hs
index b54761b11..62ce82635 100644
--- a/Distribution/Server/Features/ReverseDependencies/State.hs
+++ b/Distribution/Server/Features/ReverseDependencies/State.hs
@@ -1,10 +1,10 @@
-{-# LANGUAGE DeriveDataTypeable, TypeFamilies, TemplateHaskell #-}
+{-# LANGUAGE RankNTypes, DeriveGeneric, TypeSynonymInstances, DeriveDataTypeable, GeneralizedNewtypeDeriving, TypeFamilies, TemplateHaskell #-}
 
 module Distribution.Server.Features.ReverseDependencies.State where
 
 import Distribution.Server.Packages.Types
-import Distribution.Server.Packages.State ()
-import Distribution.Server.Packages.Preferred
+import Distribution.Server.Framework.MemSize
+import Distribution.Server.Features.PreferredVersions.State
 import Distribution.Server.Packages.PackageIndex (PackageIndex)
 import qualified Distribution.Server.Packages.PackageIndex as PackageIndex
 
@@ -13,409 +13,182 @@ import Distribution.PackageDescription
 import Distribution.Version
 
 import Data.Acid (Query, Update, makeAcidic)
-import Data.List (foldl', union)
-import Data.Maybe (maybeToList, fromMaybe)
-import Data.SafeCopy (base, deriveSafeCopy)
+import Data.List (union, (\\))
+import Data.Maybe (maybeToList)
+import Data.SafeCopy hiding (Version)
 import Data.Typeable (Typeable)
 import Data.Map (Map)
 import qualified Data.Map as Map
+import Data.Bimap (Bimap, (!>), (!), member)
+import qualified Data.Bimap as Bimap
+import Control.Applicative
 import Data.Set (Set)
 import qualified Data.Set as Set
-
-import Data.STRef
-import Control.Monad.ST
 import Control.Monad.State (put, get)
-import Control.Monad.Reader (ask, asks)
-
--- The main reverse dependencies map is a drawn-out Map PackageId PackageId,
--- with an extra component to store ranges (all ranges that *could* be revdeps,
--- even if no packages in the index currently satisfy those ranges).
---
--- For selected entries of the map (foo, (2.0, (bar, [1.0]), (bar, (1.0, <3)))):
--- This means that bar-1.0 depends on a version of foo <3, and foo 2.0 meets this criterion.
-type RevDeps = Map PackageName (Map Version (Map PackageName (Set Version)), Map PackageName (Map Version VersionRange))
-
-type CombinedDeps = Map PackageName VersionRange
-
--- TODO: should this be (Maybe (Version, Maybe VersionStatus))?
--- it should be possible, albeit with a bit more work, to determine all revdeps
--- of a package which don't have any versions presently satisfying them.
--- (for an entry (a, b) of RevDeps, take (union a \ b))
-type ReverseDisplay = Map PackageName (Version, Maybe VersionStatus)
+import Control.Monad.Reader (ask)
+import Data.Graph (Graph, Vertex)
+import qualified Data.Graph as Gr
+import qualified Data.Array as Arr ((!), accum, assocs, accumArray)
 
-data ReverseIndex = ReverseIndex {
-    -- this field is a duplication of PackageIndex, so updates don't have
-    -- to use much information outside of this component, resulting in huge
-    -- happstack-state event files
-    duplicatedIndex :: PackageIndex PackageId,
+type NodeId = Int
+type RevDeps = Graph
 
-    -- The main reverse dependencies map
-    reverseDependencies :: RevDeps,
+data ReverseIndex = ReverseIndex {
+    reverseDependencies :: !RevDeps,
+    packageNodeIdMap    :: !(Bimap PackageId NodeId)
+} deriving (Eq, Show, Typeable)
 
-    -- Generated from packageNameClosure.
-    flattenedReverse :: Map PackageName (Set PackageName),
+instance MemSize ReverseIndex where
+    memSize (ReverseIndex a b) = memSize2 a b
 
-    -- Cached counts for reverse dependencies.
-    reverseCount :: Map PackageName ReverseCount
-} deriving (Eq, Show, Typeable)
 
 emptyReverseIndex :: ReverseIndex
-emptyReverseIndex = ReverseIndex (PackageIndex.fromList [])
-                                 Map.empty Map.empty Map.empty
-
-data ReverseCount = ReverseCount {
-    directReverseCount :: Int,
-    flattenedReverseCount :: Int,
-    versionReverseCount :: Map Version Int
-} deriving (Show, Eq, Typeable, Ord)
-emptyReverseCount :: ReverseCount
-emptyReverseCount = ReverseCount 0 0 Map.empty
+emptyReverseIndex = ReverseIndex (Gr.buildG (0,-1) []) Bimap.empty
 
 constructReverseIndex :: PackageIndex PkgInfo -> ReverseIndex
 constructReverseIndex index =
-    let deps = constructRevDeps index
-    in updateReverseCount $ emptyReverseIndex {
-        duplicatedIndex = constructDupIndex index,
-        reverseDependencies = deps,
-        flattenedReverse = packageNameClosure deps
+    ReverseIndex {
+        reverseDependencies = constructRevDeps index nodePkgMap,
+        packageNodeIdMap = nodePkgMap
     }
-
-constructDupIndex :: PackageIndex PkgInfo -> PackageIndex PackageId
-constructDupIndex = PackageIndex.fromList
-  . map packageId
-  . PackageIndex.allPackages
-
-updateReverseCount :: ReverseIndex -> ReverseIndex
-updateReverseCount index =
-    let deps = reverseDependencies index
-        flat = flattenedReverse index
-    in index {
-        reverseCount = flip Map.mapWithKey deps $ \pkg (versions, _) -> ReverseCount {
-            directReverseCount = Map.size . Map.unions $ Map.elems versions,
-            flattenedReverseCount = maybe 0 Set.size $ Map.lookup pkg flat,
-            versionReverseCount = Map.map Map.size versions
-        }
+    where
+        nodePkgMap = foldr (uncurry Bimap.insert) Bimap.empty $ zip (map packageId (PackageIndex.allPackages index)) [0..]
+
+addPackage :: PackageId -> [PackageId]
+           -> ReverseIndex -> ReverseIndex
+addPackage pkgid deps ri@(ReverseIndex revs nodemap) =
+    let npm = Bimap.tryInsert pkgid (Bimap.size nodemap) nodemap
+        rd = insEdges (Bimap.size npm) (map (\d -> (npm ! d, [npm ! pkgid])) deps) revs
+    in ri {
+        reverseDependencies = rd,
+        packageNodeIdMap = npm
     }
 
-addPackage :: PackageId -> CombinedDeps
-           -> ReverseIndex -> (ReverseIndex, Map PackageName [Version])
-addPackage pkgid deps revs =
-    let index = PackageIndex.insert pkgid (duplicatedIndex revs)
-        (rd, rec) = registerPackage (getAllVersions index) pkgid deps (reverseDependencies revs)
-    in (updateReverseCount $ revs {
-        duplicatedIndex = index,
-        reverseDependencies = rd,
-        flattenedReverse = packageNameClosure rd
-    }, rec)
-
-removePackage :: PackageId -> CombinedDeps
-              -> ReverseIndex -> (ReverseIndex, Map PackageName [Version])
-removePackage pkgid deps revs =
-    let index = PackageIndex.deletePackageId pkgid (duplicatedIndex revs)
-        (rd, rec) = unregisterPackage (getAllVersions index) pkgid deps (reverseDependencies revs)
-    in (updateReverseCount $ revs {
-        duplicatedIndex = index,
+removePackage :: PackageId -> [PackageId]
+              -> ReverseIndex -> ReverseIndex
+removePackage pkgid deps ri@(ReverseIndex revs nodemap) =
+    let rd = delEdges (map (\d -> (nodemap ! d, [nodemap ! pkgid])) deps) revs
+    in ri {
         reverseDependencies = rd,
-        flattenedReverse = packageNameClosure rd
-    }, rec)
-
-changePackage :: PackageId -> CombinedDeps -> CombinedDeps
-              -> ReverseIndex -> (ReverseIndex, Map PackageName [Version])
-changePackage pkgid deps deps' revs =
-    let index = PackageIndex.insert pkgid (duplicatedIndex revs)
-        allVersions = getAllVersions index
-        (rd,  rec)  = unregisterPackage allVersions pkgid deps (reverseDependencies revs)
-        (rd', rec') = registerPackage allVersions pkgid deps' rd
-    in (updateReverseCount $ revs {
-        duplicatedIndex = index,
-        reverseDependencies = rd',
-        flattenedReverse = packageNameClosure rd'
-    }, Map.unionWith union rec rec')
---------------------------------------------------------------------------------
--- Managing the RevDeps index.
+        packageNodeIdMap = nodemap
+    }
 
-constructRevDeps :: PackageIndex PkgInfo -> RevDeps
-constructRevDeps index = foldl' (\revs pkg -> fst $ registerPackage (getAllVersions index) (packageId pkg) (getAllDependencies pkg) revs) Map.empty $ PackageIndex.allPackages index
+changePackage :: PackageId -> [PackageId] -> [PackageId]
+              -> ReverseIndex -> ReverseIndex
+changePackage pkgid deps deps' ri@(ReverseIndex revs nodemap) =
+    let
+        npm = Bimap.tryInsert pkgid (Bimap.size nodemap) nodemap
+        rd  = delEdges (map (\d -> (npm ! d, [npm ! pkgid])) deps) revs
+        rd' = insEdges (Bimap.size npm) (map (\d -> (npm ! d, [npm ! pkgid])) deps') rd
+    in ri {
+        reverseDependencies = rd',
+        packageNodeIdMap = npm
+    }
 
 getAllVersions :: Package pkg => PackageIndex pkg -> PackageName -> [Version]
 getAllVersions index = map packageVersion . PackageIndex.lookupPackageName index
 
--- | Given a package id, modify the entries of the package's dependencies in
--- the reverse dependencies mapping to include it.
-registerPackage :: (PackageName -> [Version])
-                -> PackageId -> CombinedDeps
-                -> RevDeps -> (RevDeps, Map PackageName [Version])
-registerPackage getVersions (PackageIdentifier name version) ranges revs =
-    let deps = getLinkedNodes getVersions ranges
-        revs'  = foldl' goRegister revs $ Map.toList $ Map.intersectionWith (,) ranges deps
-        revs'' = backtrace revs'
-    in (revs'', deps)
-  where
-    pkgMap = Map.singleton name $ Set.singleton version
-    -- this takes each of the registered packages dependencies and puts an entry
-    -- of it there. e.g. a new version of base would not have much work to do
-    -- here because it has no dependencies
-    goRegister prev (pkgname, (range, versions)) =
-        -- revPackage encodes the dependency (name -> pkgname) in a way that can
-        -- be inserted into pkgname's reverse dependency mapping
-        let revPackage = Map.fromList $ map (\v -> (v, pkgMap)) versions
-            revRange   = Map.singleton name (Map.singleton version range)
-        in  Map.insertWith (\(small, small') (big, big') -> (Map.unionWith (Map.unionWith Set.union) big small, Map.unionWith (flip const) big' small')) pkgname (revPackage, revRange) prev
-    -- this uses the package's existing reverse dependencies, regardless of
-    -- version, to find reverse dependencies for this version in particular.
-    -- e.g. a new version of base would have to recalculate the dependencies
-    -- of nearly all of the packages in the index
-    backtrace prev = case Map.lookup name prev of
-        Nothing -> prev
-        Just (vs, rs) ->
-            let revVersion = Map.map (Set.fromList . map fst . filter (withinRange version . snd) . Map.toList) rs
-            in  Map.insert name (Map.insertWith (\new old -> Map.unionWith Set.union old new) version revVersion vs, rs) prev
-
--- | Given a package id, modify the entries of the package's dependencies in
--- the reverse dependencies mapping to exclude it.
-unregisterPackage :: (PackageName -> [Version])
-                  -> PackageId -> CombinedDeps
-                  -> RevDeps -> (RevDeps, Map PackageName [Version])
-unregisterPackage getVersions (PackageIdentifier name version) ranges revs =
-    let deps = getLinkedNodes getVersions ranges
-        revs'  = foldl' goUnregister revs $ Map.toList $ Map.intersectionWith (,) ranges deps
-        revs'' = backtrace revs'
-    in (revs'', deps)
-  where
-    pkgMap = Map.singleton name $ Set.singleton version
-    goUnregister prev (pkgname, (range, versions)) =
-        let revPackage = Map.fromList $ map (\v -> (v, pkgMap)) versions
-            revRange   = Map.singleton pkgname (Map.fromList $ map (\v -> (v, range)) versions)
-        -- there are possibly better ways to go about this
-        in  Map.differenceWith (\(a, b) (c, d) -> keepMaps $
-              ( Map.differenceWith (\e f ->
-                    keepMap $ Map.differenceWith (\g h ->
-                        keepSet $ Set.difference g h)
-                    e f)
-                a c
-              , Map.differenceWith (\e f ->
-                    keepMap $ Map.difference e f)
-                b d
-              )) prev (Map.singleton pkgname (revPackage, revRange))
-    backtrace prev = Map.update (\(vs, rs) -> keepMaps (Map.delete version vs, rs)) name prev
-
---------------------------------------------------------------------------------
--- Calculating dependencies and selecting versions
-
--- | Given a package, determine the packages on which it depends.
--- For all such packages, return the specific versions that satisfy the
--- dependency as indicated in the cabal file.
-getLinkedNodes :: (PackageName -> [Version])
-               -> CombinedDeps -> Map PackageName [Version]
-getLinkedNodes getVersions pkgs = Map.mapWithKey (\pkg range -> selectVersions range $ getVersions pkg) pkgs
-
--- | Given a dependency (a package name and a version range), find all versions
--- in the current package index that satisfy it.
-selectVersions :: VersionRange -> [Version] -> [Version]
-selectVersions range versions= filter (flip withinRange range) versions
-
--- | Collect all dependencies specified in a package's cabal file, considering
--- all alternatives.
---
--- This unions all version ranges together from different branches, which is
--- imprecise but mostly good enough (a slightly better heuristic might be
--- intersecting within a block, but unioning blocks together).
-getAllDependencies :: PkgInfo -> CombinedDeps
-getAllDependencies pkg =
-    let desc = pkgDesc pkg
-    in Map.fromListWith unionVersionRanges $ toDepsList (maybeToList $ condLibrary desc)
-                                          ++ toDepsList (map snd $ condExecutables desc)
-  where toDepsList :: [CondTree v [Dependency] a] -> [(PackageName, VersionRange)]
-        toDepsList l = [ (p, v) | Dependency p v <- concatMap harvestDependencies l ]
-
--- | Collect all dependencies from all branches of a condition tree.
-harvestDependencies :: CondTree v [Dependency] a -> [Dependency]
-harvestDependencies (CondNode _ deps comps) = deps ++ concatMap forComponent comps
-  where forComponent (_, iftree, elsetree) = harvestDependencies iftree ++ maybe [] harvestDependencies elsetree
+constructRevDeps :: PackageIndex PkgInfo -> Bimap PackageId NodeId -> RevDeps
+constructRevDeps index nodemap =
+    let allPackages = concat {- concatMap (take 5) -} $ PackageIndex.allPackagesByName index
+        edges = concatMap (\pkg -> map (\dep -> (nodemap ! dep, (nodemap !) . packageId $ pkg)) (getAllDependencies pkg index) ) allPackages
+    in Gr.buildG (0, Bimap.size nodemap) edges
+
+getAllDependencies :: Package pkg => PkgInfo -> PackageIndex pkg -> [PackageId]
+getAllDependencies pkg index =
+    toDepsList (maybeToList $ condLibrary desc) ++ toDepsList (map snd $ condExecutables desc)
+    where
+        desc = pkgDesc pkg
+        toDepsList :: [CondTree v [Dependency] a] -> [PackageId]
+        toDepsList l = map packageId (concatMap (PackageIndex.lookupDependency index) $ concatMap harvestDependencies l)
+        -- | Collect all dependencies from all branches of a condition tree.
+        harvestDependencies :: CondTree v [Dependency] a -> [Dependency]
+        harvestDependencies (CondNode _ deps comps) = deps ++ concatMap forComponent comps
+          where forComponent (_, iftree, elsetree) = harvestDependencies iftree ++ maybe [] harvestDependencies elsetree
+
+---------------------------------ReverseDisplay
 
 --------------------------------------------------------------------------------
 -- Calculating ReverseDisplays
-type VersionIndex = (PackageName -> (PreferredInfo, [Version]))
+data ReverseCount = ReverseCount {
+    directCount :: Int,
+    totalCount :: Int,
+    versionCount :: Map Version Int
+} deriving (Show, Eq, Typeable, Ord)
+
+instance MemSize ReverseCount where
+    memSize (ReverseCount a b c) = memSize3 a b c
+
+type ReverseDisplay = Map PackageName (Version, Maybe VersionStatus)
 
--- TODO: this should use the secondary PackageId -> VersionRange mapping in RevDeps,
--- so it gets all possible versions, not just those currently in the index.
-perPackageReverse :: VersionIndex -> RevDeps -> PackageName -> ReverseDisplay
-perPackageReverse indexFunc revs pkg = case Map.lookup pkg revs of
-    Nothing   -> Map.empty
-    Just (dict, _) -> constructReverseDisplay indexFunc (Map.unionsWith Set.union $ Map.elems dict)
+type VersionIndex = (PackageName -> (PreferredInfo, [Version]))
 
-perVersionReverse :: VersionIndex -> RevDeps -> PackageId -> ReverseDisplay
-perVersionReverse indexFunc revs pkg = case Map.lookup (packageVersion pkg) . fst =<< Map.lookup (packageName pkg) revs of
-    Nothing   -> Map.empty
-    Just dict -> constructReverseDisplay indexFunc dict
+perPackageReverse :: VersionIndex -> PackageIndex PkgInfo -> ReverseIndex -> PackageName -> ReverseDisplay
+perPackageReverse indexFunc index (ReverseIndex revs nodemap) pkg =
+    if any (/= 0) (map (outdeg revs . (nodemap !)) packageids)
+        then constructReverseDisplay indexFunc packagemap
+        else Map.empty
+    where
+        packageids = map packageId $ PackageIndex.lookupPackageName index pkg
+        packagemap = toPackageMap $ map (nodemap !>) (concatMap (suc revs . (nodemap !)) packageids)
+
+perVersionReverse :: VersionIndex -> ReverseIndex -> PackageId -> ReverseDisplay
+perVersionReverse indexFunc (ReverseIndex revs nodemap) pkg =
+    if (/= 0) (outdeg revs (nodemap ! pkg))
+        then constructReverseDisplay indexFunc packagemap
+        else Map.empty
+    where
+        packagemap = toPackageMap $ map (nodemap !>) $ (suc revs . (nodemap !)) pkg
 
 constructReverseDisplay :: VersionIndex -> Map PackageName (Set Version) -> ReverseDisplay
-constructReverseDisplay indexFunc deps =
-    Map.mapMaybeWithKey (uncurry maybeBestVersion . indexFunc) deps
+constructReverseDisplay indexFunc =
+    Map.mapMaybeWithKey (uncurry maybeBestVersion . indexFunc)
 
 getDisplayInfo :: PreferredVersions -> PackageIndex PkgInfo -> VersionIndex
 getDisplayInfo preferred index pkgname = (,)
     (Map.findWithDefault emptyPreferredInfo pkgname $ preferredMap preferred)
     (map packageVersion . PackageIndex.lookupPackageName index $ pkgname)
 
---------------------------------------------------------------------------------
--- Keeping a cached map of selected versions.
---
--- Currently it's rather quick to calculate each, and the majority of processing
--- will probably go towards rendering it in HTML/JSON/whathaveyou anyway. So this
--- is not used.
---
--- Still, in a future Hackage where preferred-versions and deprecated versions
--- are *very* widely used, incremental updates of an display index might become
--- necessary. In such a future, there would be two maps in the ReverseIndex
--- structure, both to ReverseDisplay from PackageName and PackageId. They would
--- need to be updated with updatePackageReverse and updateVersionReverse,
--- respectively, whenever a package is added, removed, or has its preferred info
--- changed.
-
-constructPackageReverse :: VersionIndex -> RevDeps -> Map PackageName ReverseDisplay
-constructPackageReverse indexFunc revs =
-    Map.fromList $ do
-        pkg <- Map.keys revs
-        rev <- maybeToList . keepMap $ perPackageReverse indexFunc revs pkg
-        return (pkg, rev)
-
-constructVersionReverse :: VersionIndex -> RevDeps -> Map PackageId ReverseDisplay
-constructVersionReverse indexFunc revs =
-    Map.fromList $ do
-        pkg <- getNodes =<< Map.toList revs
-        rev <- maybeToList . keepMap $ perVersionReverse indexFunc revs pkg
-        return (pkg, rev)
-  where
-    getNodes :: (PackageName, (Map Version a, b)) -> [PackageId]
-    getNodes (name, (versions, _)) = map (PackageIdentifier name) $ Map.keys versions
-
--- | With a package which has just been updated, make sure the version displayed
--- in its reverse display is the most recent. To do this, each of its dependencies
--- needs its ReverseDisplay updated.
-updateReverseDisplay :: VersionIndex -> PackageName -> Set Version -> ReverseDisplay -> ReverseDisplay
-updateReverseDisplay indexFunc pkgname versions revDisplay =
-    let toVersions = uncurry maybeBestVersion . indexFunc
-    in case toVersions pkgname versions of
-        Nothing -> revDisplay
-        Just status -> Map.insert pkgname status revDisplay
-
--- If the RevDeps index is modified through registering/unregistering packages,
--- updatePackageReverse and updateVersionReverse should be given a list of
--- package names/package ids distrilled from the resultant (Map PackageName
--- [Version]). The idea is to sync it with the just-updated RevDeps.
---
--- If a package's PreferredVersions are modified, these functions should be
--- called with the same information taken from the getLinkedNodes function.
--- In this case, the RevDeps data structure hasn't changed.
-
-updatePackageReverse :: VersionIndex -> PackageName -> [PackageName] -> RevDeps -> Map PackageName ReverseDisplay -> Map PackageName ReverseDisplay
-updatePackageReverse indexFunc updated deps revs nameMap =
-    foldl' (\revd pkg -> Map.alter (alterRevDisplay pkg . fromMaybe Map.empty) pkg revd) nameMap deps
-  where
-    lookupVersions :: PackageName -> Set Version
-    lookupVersions pkgname = maybe Set.empty (Set.unions . map (Map.findWithDefault Set.empty $ updated) . Map.elems . fst) $ Map.lookup pkgname revs
-    alterRevDisplay :: PackageName -> ReverseDisplay -> Maybe ReverseDisplay
-    alterRevDisplay pkgname rev = keepMap $ updateReverseDisplay indexFunc updated (lookupVersions pkgname) rev
-
-updateVersionReverse :: VersionIndex -> PackageName -> [PackageId] -> RevDeps -> Map PackageId ReverseDisplay -> Map PackageId ReverseDisplay
-updateVersionReverse indexFunc updated deps revs pkgMap =
-    foldl' (\revd pkg -> Map.alter (alterRevDisplay pkg . fromMaybe Map.empty) pkg revd) pkgMap deps
-  where
-    lookupVersions :: PackageId -> Set Version
-    lookupVersions pkgid = maybe Set.empty (Map.findWithDefault Set.empty updated) $ Map.lookup (packageVersion pkgid) . fst =<< Map.lookup (packageName pkgid) revs
-    alterRevDisplay :: PackageId -> ReverseDisplay -> Maybe ReverseDisplay
-    alterRevDisplay pkgid rev = keepMap $ updateReverseDisplay indexFunc updated (lookupVersions pkgid) rev
-
---------------------------------------------------------------------------------
--- Flattening the graph
--- Exposing indirect dependencies is as simple as taking the set difference
--- of the edges of a node in the dependency graph G and its closure G+.
-
--- Collect all indirect versioned dependencies. This takes around 45 seconds
--- on the current package index (in ghci). It probably isn't worth exposing.
-packageIdClosure :: RevDeps -> Map PackageId (Set PackageId)
-packageIdClosure revs = Map.fromDistinctAscList $ transitiveClosure
-    (concatMap getNodes $ Map.toList revs)
-    (\pkg -> maybe [] (concatMap getEdges . Map.toList)
-           $ Map.lookup (packageVersion pkg) . fst =<< Map.lookup (packageName pkg) revs)
-  where
-    getNodes :: (PackageName, (Map Version a, b)) -> [PackageId]
-    getNodes (name, (versions, _)) = map (PackageIdentifier name) $ Map.keys versions
-
-    getEdges :: (PackageName, Set Version) -> [PackageId]
-    getEdges (name, versions) = map (PackageIdentifier name) $ Set.toList versions
-
--- Collect all indirect name dependencies. This takes around 2 seconds on the
--- current package index. It should be fine to reconstruct from scratch every
--- time the package index is updated, since code to incrementally update a
--- transitive closure can be messy and stateful and complicated.
-packageNameClosure :: RevDeps -> Map PackageName (Set PackageName)
-packageNameClosure revs = Map.fromDistinctAscList $ transitiveClosure
-    (Map.keys revs)
-    (\pkg -> maybe [] (concatMap Map.keys . Map.elems . fst)
-           $ Map.lookup pkg revs)
-
--- Get the transitive closure of a graph from the set of nodes and a neighbor
--- function. This implementation uses depth-first search in the ST monad
--- where cycles are broken if a visited node has been seen before.
---
--- The same basic algorithm could be used to make a DAG structure.
-transitiveClosure :: forall a. Ord a => [a] -> (a -> [a]) -> [(a, Set a)]
-transitiveClosure core edges = runST $ do
-    list <- mapM (\node -> newSTRef Nothing >>= \ref -> return (node, ref)) core
-    let visited = Map.fromList list
-    mapM_ (collect visited) core
-    list' <- mapM (\(node, ref) -> readSTRef ref >>= \val -> return (node, val)) list
-    return [ (node, nodes) | (node, Just nodes) <- list' ]
-  where
-    collect :: Map a (STRef s (Maybe (Set a))) -> a -> ST s (Set a)
-    collect links node = do
-        case Map.lookup node links of
-            -- attempting to visit a node which wasn't given to us
-            Nothing  -> return Set.empty
-            Just ref -> readSTRef ref >>= \t -> case t of
-                -- the node has already been visited
-                Just calc -> return calc
-                Nothing   -> do
-                    -- Mark the node as visited with results pending. If a cycle
-                    -- brings us back to collect the same node, it will yield
-                    -- an empty list. This breaks the cycle for whatever node
-                    -- was visited first.
-                    --
-                    -- There are smarter algorithms that can
-                    -- get transitive closures of cyclic graphs, but cycles are
-                    -- highly pathological for the types of graphs we'll be
-                    -- traversing, so no need to worry.
-                    writeSTRef ref $ Just Set.empty
-                    let outEdges = edges node
-                    collected <- fmap Set.unions $ mapM (collect links) outEdges
-                    let connected = Set.union (Set.fromList outEdges) collected
-                    writeSTRef ref $ Just connected
-                    return connected
 
 ------------------------------------ Utility
--- For cases when, if a Map or Set is empty, it's as good as nothing at all.
-keepMap :: Ord k => Map k a -> Maybe (Map k a)
-keepMap con = if Map.null con then Nothing else Just con
 
-keepMaps :: (Ord k, Ord k') => (Map k a, Map k' b) -> Maybe (Map k a, Map k' b)
-keepMaps con@(c, c') = if Map.null c && Map.null c' then Nothing else Just con
+----------------------------Graph Utility----------
+suc :: RevDeps -> Vertex -> [Vertex]
+suc g v = g Arr.! v
 
-keepSet :: Ord a => Set a -> Maybe (Set a)
-keepSet con = if Set.null con then Nothing else Just con
+outdeg :: RevDeps -> Vertex -> Int
+outdeg r = length . suc r
 
---------------------------------------------------------------------------------
--- State
---
--- Last but agnostic of other ranking schemes,
--- methods for manipulating the global state.
+insEdges :: Int -> [(NodeId, [NodeId])] -> RevDeps -> RevDeps
+insEdges nodesize edges revdeps = Arr.accumArray union [] (0, nodesize) (edges ++ Arr.assocs revdeps)
 
-deriveSafeCopy 0 'base ''ReverseIndex
-deriveSafeCopy 0 'base ''ReverseCount
+delEdges :: [(NodeId, [NodeId])] -> RevDeps -> RevDeps
+delEdges edges revdeps =
+    Arr.accum (\\) revdeps edges
 
-initialReverseIndex :: ReverseIndex
-initialReverseIndex = emptyReverseIndex
+--------------------------------------
+countUtil :: [(Version, Set PackageName, Int)] -> (Int, Int)
+countUtil = (\(x,y) -> (Set.size x, y)) . foldr (\(_,a, b) (as, bs) -> (Set.union a as, b + bs)) (Set.empty,0)
+
+toPackageMap :: [PackageId] -> Map PackageName (Set Version)
+toPackageMap assocs = Map.fromListWith Set.union [(k, Set.singleton v) | PackageIdentifier k v <- assocs]
+
+toReverseCount :: [(Version, Set PackageName , Int)] -> ReverseCount
+toReverseCount assocs = uncurry ReverseCount count (Map.fromListWith (+) [(k, Set.size v) | (k, v, _) <- assocs])
+    where
+        count = countUtil assocs
+
+-------------------------------------------------------
+instance (SafeCopy a, SafeCopy b, Ord a, Ord b) => SafeCopy (Bimap a b) where
+    getCopy = contain $ fmap Bimap.fromList safeGet
+    putCopy = contain . safePut . Bimap.toList
+
+-- instance (SafeCopy a, SafeCopy b) => SafeCopy (Graph) where
+--     putCopy = contain . safePut . Gr.edges
+--     getCopy = contain $ fmap (Gr.buildG (0,maxNodes)) safeGet
+
+$(deriveSafeCopy 0 'base ''ReverseIndex)
+$(deriveSafeCopy 0 'base ''ReverseCount)
 
 getReverseIndex :: Query ReverseIndex ReverseIndex
 getReverseIndex = ask
@@ -423,33 +196,67 @@ getReverseIndex = ask
 replaceReverseIndex :: ReverseIndex -> Update ReverseIndex ()
 replaceReverseIndex = put
 
-addReversePackage :: PackageId -> CombinedDeps -> Update ReverseIndex (Map PackageName [Version])
+addReversePackage :: PackageId -> [PackageId] -> Update ReverseIndex ()
 addReversePackage pkgid deps = get >>= \revs ->
-    let (revs', rec) = addPackage pkgid deps revs
-    in put revs' >> return rec
+    let revs' = addPackage pkgid deps revs
+    in put revs'
 
-removeReversePackage :: PackageId -> CombinedDeps -> Update ReverseIndex (Map PackageName [Version])
+removeReversePackage :: PackageId -> [PackageId] -> Update ReverseIndex ()
 removeReversePackage pkgid deps = get >>= \revs ->
-    let (revs', rec) = removePackage pkgid deps revs
-    in put revs' >> return rec
+    let revs' = removePackage pkgid deps revs
+    in put revs'
 
-changeReversePackage :: PackageId -> CombinedDeps -> CombinedDeps -> Update ReverseIndex (Map PackageName [Version])
+changeReversePackage :: PackageId -> [PackageId] -> [PackageId] -> Update ReverseIndex ()
 changeReversePackage pkgid deps deps' = get >>= \revs ->
-    let (revs', rec) = changePackage pkgid deps deps' revs
-    in put revs' >> return rec
-
-getReverseCount :: PackageName -> Query ReverseIndex ReverseCount
-getReverseCount pkg = asks $ Map.findWithDefault emptyReverseCount pkg . reverseCount
-
-getFlattenedReverse :: PackageName -> Query ReverseIndex (Set PackageName)
-getFlattenedReverse pkg = asks $ Map.findWithDefault Set.empty pkg . flattenedReverse
-
-makeAcidic ''ReverseIndex ['getReverseIndex
-                          ,'replaceReverseIndex
-                          ,'addReversePackage
-                          ,'removeReversePackage
-                          ,'changeReversePackage
-                          ,'getReverseCount
-                          ,'getFlattenedReverse
-                          ]
-
+    let revs' = changePackage pkgid deps deps' revs
+    in put revs'
+
+getDependencies :: PackageName -> PackageIndex PkgInfo -> Query ReverseIndex (Set PackageName)
+getDependencies pkg index = getDependencies' pkg index <$> ask
+
+getDependencies' :: PackageName -> PackageIndex PkgInfo -> ReverseIndex -> Set PackageName
+getDependencies' pkg index (ReverseIndex revdeps nodemap) =
+    let packageIds = map packageId $ PackageIndex.lookupPackageName index pkg
+        pkgname = packageName . (nodemap !>)
+    in Set.fromList (map pkgname (concatMap (suc revdeps . (nodemap !)) packageIds))
+
+getDependenciesI :: PackageName -> PackageIndex PkgInfo -> Query ReverseIndex (Set PackageName)
+getDependenciesI pkg index = getDependenciesI' pkg index <$> ask
+
+getDependenciesI' :: PackageName -> PackageIndex PkgInfo -> ReverseIndex -> Set PackageName
+getDependenciesI' pkg index (ReverseIndex revdeps nodemap) =
+    let packageIds = map packageId $ PackageIndex.lookupPackageName index pkg
+        pkgname = packageName . (nodemap !>)
+        reachables = Set.fromList . map pkgname . concatMap (\p -> Gr.reachable revdeps (nodemap ! p)) . filter (`member` nodemap) $ packageIds
+    in Set.difference reachables (Set.singleton pkg)
+
+getReverseCount :: PackageName -> PackageIndex PkgInfo -> Query ReverseIndex ReverseCount
+getReverseCount pkg index = getReverseCount' pkg index <$> ask
+
+getReverseCount' :: PackageName -> PackageIndex PkgInfo -> ReverseIndex -> ReverseCount
+getReverseCount' pkg index (ReverseIndex revdeps nodemap) =
+    let packageIds = map packageId $ PackageIndex.lookupPackageName index pkg
+        pkgname = packageName . (nodemap !>)
+        vii = map (\p -> (pkgVersion p, Set.fromList . map pkgname . suc revdeps $ (nodemap ! p), length (Gr.reachable revdeps (nodemap ! p) ) - 1)) (filter (`member` nodemap) packageIds)
+    in toReverseCount vii
+
+getReverseCountId :: PackageId -> Query ReverseIndex (Int,Int)
+getReverseCountId pkg = getReverseCountId' pkg <$> ask
+
+getReverseCountId' :: PackageId -> ReverseIndex -> (Int, Int)
+getReverseCountId' pkg (ReverseIndex revdeps nodemap)
+    | pkg `member` nodemap = (outdeg revdeps (nodemap ! pkg), length (Gr.reachable revdeps (nodemap ! pkg)) - 1)
+    | otherwise = (0,0)
+
+
+$(makeAcidic ''ReverseIndex ['getReverseIndex
+                            ,'replaceReverseIndex
+                            ,'addReversePackage
+                            ,'removeReversePackage
+                            ,'changeReversePackage
+                            ,'getReverseCount
+                            ,'getReverseCountId
+                            ,'getDependencies
+                            ,'getDependenciesI
+                          -- ,'getFlattenedReverse
+                            ])
diff --git a/Distribution/Server/Features/Tags.hs b/Distribution/Server/Features/Tags.hs
index de1f0e141..3f06f53f2 100644
--- a/Distribution/Server/Features/Tags.hs
+++ b/Distribution/Server/Features/Tags.hs
@@ -9,16 +9,14 @@ module Distribution.Server.Features.Tags (
     constructTagIndex
   ) where
 
-import Control.Applicative (optional)
-
 import Distribution.Server.Framework
 import Distribution.Server.Framework.BackupDump
 
 import Distribution.Server.Features.Tags.State
 import Distribution.Server.Features.Tags.Backup
-
 import Distribution.Server.Features.Core
 import Distribution.Server.Features.Upload
+import Distribution.Server.Features.Users
 
 import qualified Distribution.Server.Packages.PackageIndex as PackageIndex
 import Distribution.Server.Packages.PackageIndex (PackageIndex)
@@ -47,11 +45,14 @@ data TagsFeature = TagsFeature {
 
     queryGetTagList     :: forall m. MonadIO m => m [(Tag, Set PackageName)],
     queryTagsForPackage :: forall m. MonadIO m => PackageName -> m (Set Tag),
+    queryReviewTagsForPackage :: forall m. MonadIO m => PackageName -> m (Set Tag,Set Tag),
+    queryAliasForTag :: forall m. MonadIO m => Tag -> m Tag,
 
     -- All package names that were modified, and all tags that were modified
     -- In almost all cases, one of these will be a singleton. Happstack
     -- functions should be used to query the resultant state.
     tagsUpdated :: Hook (Set PackageName, Set Tag) (),
+
     -- Calculated tags are used so that other features can reserve a
     -- tag for their own use (a calculated, rather than freely
     -- assignable, tag). It is a subset of the main mapping.
@@ -63,7 +64,8 @@ data TagsFeature = TagsFeature {
 
     withTagPath :: forall a. DynamicPath -> (Tag -> Set PackageName -> ServerPartE a) -> ServerPartE a,
     collectTags :: forall m. MonadIO m => Set PackageName -> m (Map PackageName (Set Tag)),
-    putTags     :: PackageName -> ServerPartE ()
+    putTags     :: Maybe String -> Maybe String -> Maybe String -> Maybe String -> PackageName -> ServerPartE (),
+    mergeTags   :: Maybe String -> Tag -> ServerPartE ()
 
 }
 
@@ -75,6 +77,8 @@ data TagsResource = TagsResource {
     tagListing :: Resource,
     packageTagsListing :: Resource,
     packageTagsEdit :: Resource,
+    tagAliasEdit :: Resource,
+    tagAliasEditForm :: Resource,
 
     tagUri :: String -> Tag -> String,
     tagsUri :: String -> String,
@@ -84,29 +88,33 @@ data TagsResource = TagsResource {
 initTagsFeature :: ServerEnv
                 -> IO (CoreFeature
                     -> UploadFeature
+                    -> UserFeature
                     -> IO TagsFeature)
 initTagsFeature ServerEnv{serverStateDir} = do
     tagsState <- tagsStateComponent serverStateDir
+    tagAlias <- tagsAliasComponent serverStateDir
     specials  <- newMemStateWHNF emptyPackageTags
     updateTag <- newHook
 
-    return $ \core@CoreFeature{..} upload -> do
-      let feature = tagsFeature core upload tagsState specials updateTag
+    return $ \core@CoreFeature{..} upload user -> do
+      let feature = tagsFeature core upload user tagsState tagAlias specials updateTag
 
       registerHookJust packageChangeHook isPackageChangeAny $ \(pkgid, mpkginfo) ->
         case mpkginfo of
           Nothing      -> return ()
           Just pkginfo -> do
             let pkgname = packageName pkgid
-                tags = Set.fromList . constructImmutableTags . pkgDesc $ pkginfo
-            updateState tagsState . SetPackageTags pkgname $ tags
-            runHook_ updateTag (Set.singleton pkgname, tags)
+                tags = constructImmutableTags . pkgDesc $ pkginfo
+            aliases <- mapM (queryState tagAlias . GetTagAlias) tags
+            let newtags = Set.fromList aliases
+            updateState tagsState . SetPackageTags pkgname $ newtags
+            runHook_ updateTag (Set.singleton pkgname, newtags)
 
       return feature
 
 tagsStateComponent :: FilePath -> IO (StateComponent AcidState PackageTags)
 tagsStateComponent stateDir = do
-  st <- openLocalStateFrom (stateDir </> "db" </> "Tags") initialPackageTags
+  st <- openLocalStateFrom (stateDir </> "db" </> "Tags" </> "Existing") initialPackageTags
   return StateComponent {
       stateDesc    = "Package tags"
     , stateHandle  = st
@@ -117,18 +125,33 @@ tagsStateComponent stateDir = do
     , resetState   = tagsStateComponent
     }
 
+tagsAliasComponent :: FilePath -> IO (StateComponent AcidState TagAlias)
+tagsAliasComponent stateDir = do
+  st <- openLocalStateFrom (stateDir </> "db" </> "Tags" </> "Alias") emptyTagAlias
+  return StateComponent {
+      stateDesc    = "Tags Alias"
+    , stateHandle  = st
+    , getState     = query st GetTagAliasesState
+    , putState     = update st . AddTagAliasesState
+    , backupState  = \_ aliases -> [csvToBackup ["aliases.csv"] $ aliasToCSV aliases]
+    , restoreState = aliasBackup
+    , resetState   = tagsAliasComponent
+    }
+
 tagsFeature :: CoreFeature
             -> UploadFeature
+            -> UserFeature
             -> StateComponent AcidState PackageTags
+            -> StateComponent AcidState TagAlias
             -> MemState PackageTags
             -> Hook (Set PackageName, Set Tag) ()
             -> TagsFeature
 
-tagsFeature CoreFeature{ queryGetPackageIndex
-                       , coreResource = CoreResource { guardValidPackageName }
-                       }
-            UploadFeature{ guardAuthorisedAsMaintainerOrTrustee }
+tagsFeature CoreFeature{ queryGetPackageIndex }
+            UploadFeature{ maintainersGroup, trusteesGroup }
+            UserFeature{ guardAuthorised' }
             tagsState
+            tagsAlias
             calculatedTags
             tagsUpdated
   = TagsFeature{..}
@@ -136,6 +159,8 @@ tagsFeature CoreFeature{ queryGetPackageIndex
     tagsResource = fix $ \r -> TagsResource
         { tagsListing = resourceAt "/packages/tags/.:format"
         , tagListing = resourceAt "/packages/tag/:tag.:format"
+        , tagAliasEdit = resourceAt "/packages/tag/:tag/alias"
+        , tagAliasEditForm = resourceAt "/packages/tag/:tag/alias/edit"
         , packageTagsListing = resourceAt "/package/:package/tags.:format"
         , packageTagsEdit    = resourceAt "/package/:package/tags/edit"
         , tagUri = \format tag -> renderResource (tagListing r) [display tag, format]
@@ -169,7 +194,9 @@ tagsFeature CoreFeature{ queryGetPackageIndex
     initImmutableTags = do
             index <- queryGetPackageIndex
             let calcTags = tagPackages $ constructImmutableTagIndex index
-            forM_ (Map.toList calcTags) $ uncurry setCalculatedTag
+            aliases <- mapM (queryState tagsAlias . GetTagAlias) $ Map.keys calcTags
+            let calcTags' = Map.toList . Map.fromListWith Set.union $ zip aliases (Map.elems calcTags)
+            forM_ calcTags' $ uncurry setCalculatedTag
 
     queryGetTagList :: MonadIO m => m [(Tag, Set PackageName)]
     queryGetTagList = queryState tagsState GetTagList
@@ -177,6 +204,12 @@ tagsFeature CoreFeature{ queryGetPackageIndex
     queryTagsForPackage :: MonadIO m => PackageName -> m (Set Tag)
     queryTagsForPackage pkgname = queryState tagsState (TagsForPackage pkgname)
 
+    queryAliasForTag :: MonadIO m => Tag -> m Tag
+    queryAliasForTag tag = queryState tagsAlias (GetTagAlias tag)
+
+    queryReviewTagsForPackage :: MonadIO m => PackageName -> m (Set Tag,Set Tag)
+    queryReviewTagsForPackage pkgname = queryState tagsState (LookupReviewTags pkgname)
+
     setCalculatedTag :: Tag -> Set PackageName -> IO ()
     setCalculatedTag tag pkgs = do
       modifyMemState calculatedTags (setTag tag pkgs)
@@ -195,20 +228,72 @@ tagsFeature CoreFeature{ queryGetPackageIndex
         pkgMap <- liftM packageTags $ queryState tagsState GetPackageTags
         return $ Map.fromDistinctAscList . map (\pkg -> (pkg, Map.findWithDefault Set.empty pkg pkgMap)) $ Set.toList pkgs
 
-    putTags :: PackageName -> ServerPartE ()
-    putTags pkgname = do
-      guardValidPackageName pkgname
-      guardAuthorisedAsMaintainerOrTrustee pkgname
-      mtags <- optional $ look "tags"
-      case simpleParse =<< mtags of
-          Just (TagList tags) -> do
-              calcTags <- fmap (packageToTags pkgname) $ readMemState calculatedTags
-              let tagSet = Set.fromList tags `Set.union` calcTags
-              void $ updateState tagsState $ SetPackageTags pkgname tagSet
-              runHook_ tagsUpdated (Set.singleton pkgname, tagSet)
-              return ()
+    mergeTags :: Maybe String -> Tag -> ServerPartE ()
+    mergeTags targetTag deprTag =
+        case simpleParse =<< targetTag of
+            Just (Tag orig) -> do
+                index <- queryGetPackageIndex
+                void $ updateState tagsAlias $ AddTagAlias (Tag orig) deprTag
+                void $ constructMergedTagIndex (Tag orig) deprTag index
+            _ -> errBadRequest "Tag not recognised" [MText "Couldn't parse tag. It should be a single tag."]
+
+    -- tags on merging
+    constructMergedTagIndex :: forall m. (Functor m, MonadIO m) => Tag -> Tag -> PackageIndex PkgInfo -> m PackageTags
+    constructMergedTagIndex orig depr = foldM addToTags emptyPackageTags . PackageIndex.allPackagesByName
+      where addToTags calcTags pkgList = do
+                let info = pkgDesc $ last pkgList
+                    !pn = packageName info
+                pkgTags <- queryTagsForPackage pn
+                if Set.member depr pkgTags
+                    then do
+                        let newTags = Set.delete depr (Set.insert orig pkgTags)
+                        void $ updateState tagsState $ SetPackageTags pn newTags
+                        runHook_ tagsUpdated (Set.singleton pn, newTags)
+                        return $ setTags pn newTags calcTags
+                    else return $ setTags pn pkgTags calcTags
+
+    putTags :: Maybe String -> Maybe String -> Maybe String -> Maybe String -> PackageName -> ServerPartE ()
+    putTags addns delns raddns rdelns pkgname =
+      case simpleParse =<< addns of
+          Just (TagList add) ->
+                case simpleParse =<< delns of
+                    Just (TagList del) -> do
+                        trustainer <- guardAuthorised' [InGroup (maintainersGroup pkgname), InGroup trusteesGroup]
+                        user <- guardAuthorised' [AnyKnownUser]
+                        if trustainer
+                            then do
+                                calcTags <- queryTagsForPackage pkgname
+                                aliases <- mapM (queryState tagsAlias . GetTagAlias) add
+                                revTags <- queryReviewTagsForPackage pkgname
+                                let tagSet = (addTags `Set.union` calcTags) `Set.difference` delTags
+                                    addTags = Set.fromList aliases
+                                    delTags = Set.fromList del
+                                    rdel' = case simpleParse =<< rdelns of
+                                        Just (TagList rdel) -> rdel
+                                        Nothing -> []
+                                    radd' = case simpleParse =<< raddns of
+                                        Just (TagList radd) -> radd
+                                        Nothing -> []
+                                    addRev = Set.difference (fst revTags) (Set.fromList add `Set.union` Set.fromList radd')
+                                    delRev = Set.difference (snd revTags) (Set.fromList del `Set.union` Set.fromList rdel')
+                                void $ updateState tagsState $ SetPackageTags pkgname tagSet
+                                void $ updateState tagsState $ InsertReviewTags' pkgname addRev delRev
+                                runHook_ tagsUpdated (Set.singleton pkgname, tagSet)
+                                return ()
+                            else if user
+                                then do
+                                    aliases <- mapM (queryState tagsAlias . GetTagAlias) add
+                                    calcTags <- queryTagsForPackage pkgname
+                                    let addTags = Set.fromList aliases `Set.difference` calcTags
+                                        delTags = Set.fromList del `Set.intersection` calcTags
+                                    void $ updateState tagsState $ InsertReviewTags pkgname addTags delTags
+                                    return ()
+                                else errBadRequest "Authorization Error" [MText "You need to be logged in to propose tags"]
+                    _ -> errBadRequest "Tags not recognized" [MText "Couldn't parse your tag list. It should be comma separated with any number of alphanumerical tags. Tags can also also have -+#*."]
           Nothing -> errBadRequest "Tags not recognized" [MText "Couldn't parse your tag list. It should be comma separated with any number of alphanumerical tags. Tags can also also have -+#*."]
 
+
+
 -- initial tags, on import
 constructTagIndex :: PackageIndex PkgInfo -> PackageTags
 constructTagIndex = foldl' addToTags emptyPackageTags . PackageIndex.allPackagesByName
@@ -228,6 +313,8 @@ constructImmutableTagIndex = foldl' addToTags emptyPackageTags . PackageIndex.al
                 !tags = constructImmutableTags info
             in setTags pn (Set.fromList tags) calcTags
 
+
+
 -- These are constructed when a package is uploaded/on startup
 constructCategoryTags :: PackageDescription -> [Tag]
 constructCategoryTags = map (tagify . map toLower) . fillMe . categorySplit . category
@@ -245,10 +332,11 @@ constructImmutableTags genDesc =
         !ht = hasTests desc
         !hb = hasBenchmarks desc
     in licenseToTag l
-    ++ (if hl then [Tag "library"] else [])
-    ++ (if he then [Tag "program"] else [])
-    ++ (if ht then [Tag "test"] else [])
-    ++ (if hb then [Tag "benchmark"] else [])
+    ++ [Tag "library" | hl] -- (if hl then [Tag "library"] else [])
+    ++ [Tag "program" | he]
+    ++ [Tag "test" | ht]
+    ++ [Tag "benchmark" | hb]
+    ++ constructCategoryTags desc
   where
     licenseToTag :: License -> [Tag]
     licenseToTag l = case l of
diff --git a/Distribution/Server/Features/Tags/Backup.hs b/Distribution/Server/Features/Tags/Backup.hs
index e9fdac5e1..2e4c0d2e1 100644
--- a/Distribution/Server/Features/Tags/Backup.hs
+++ b/Distribution/Server/Features/Tags/Backup.hs
@@ -1,7 +1,10 @@
 module Distribution.Server.Features.Tags.Backup (
     tagsBackup,
+    aliasBackup,
     tagsToCSV,
-    tagsToRecord
+    aliasToCSV,
+    tagsToRecord,
+    aliasToRecord,
   ) where
 
 import Distribution.Server.Features.Tags.State
@@ -28,6 +31,19 @@ updateTags tagsState = RestoreBackup {
         else return (updateTags tagsState)
   , restoreFinalize = return tagsState
   }
+aliasBackup :: RestoreBackup TagAlias
+aliasBackup = updateAlias emptyTagAlias
+
+updateAlias :: TagAlias -> RestoreBackup TagAlias
+updateAlias tagAliases = RestoreBackup {
+    restoreEntry = \(BackupByteString entry bs) ->
+      if entry == ["tagAlias.csv"]
+        then do csv <- importCSV "tagAlias.csv" bs
+                tagAliases' <- updateFromCSVA csv tagAliases
+                return (updateAlias tagAliases')
+        else return (updateAlias tagAliases)
+  , restoreFinalize = return tagAliases
+  }
 
 updateFromCSV :: CSV -> PackageTags -> Restore PackageTags
 updateFromCSV = concatM . map fromRecord
@@ -39,11 +55,26 @@ updateFromCSV = concatM . map fromRecord
       return (setTags pkgname (Set.fromList tags) tagsState)
     fromRecord x _ = fail $ "Invalid tags record: " ++ show x
 
+updateFromCSVA :: CSV -> TagAlias -> Restore TagAlias
+updateFromCSVA = concatM . map fromRecord
+  where
+    fromRecord :: Record -> TagAlias -> Restore TagAlias
+    fromRecord (canonical:aliases) tagsAlias | not (null aliases) = do
+      tag <- parseText "tag" canonical
+      alias <- mapM (parseText "tag") aliases
+      return (setAliases tag (Set.fromList alias) tagsAlias)
+    fromRecord x _ = fail $ "Invalid tags record: " ++ show x
+
 ------------------------------------------------------------------------------
 tagsToCSV :: PackageTags -> CSV
 tagsToCSV = map (\(p, t) -> tagsToRecord p $ Set.toList t)
           . Map.toList . packageTags
 
+aliasToCSV :: TagAlias -> CSV
+aliasToCSV (TagAlias ta) = map (\(t, a) -> aliasToRecord t $ Set.toList a) . Map.toList $ ta
+
 tagsToRecord :: PackageName -> [Tag] -> Record -- [String]
 tagsToRecord pkgname tags = display pkgname:map display tags
 
+aliasToRecord :: Tag -> [Tag] -> Record -- [String]
+aliasToRecord canonical aliases = display canonical:map display aliases
diff --git a/Distribution/Server/Features/Tags/State.hs b/Distribution/Server/Features/Tags/State.hs
index cbda74c30..de33e81e0 100644
--- a/Distribution/Server/Features/Tags/State.hs
+++ b/Distribution/Server/Features/Tags/State.hs
@@ -1,7 +1,6 @@
 {-# LANGUAGE DeriveDataTypeable, TypeFamilies, TemplateHaskell, GeneralizedNewtypeDeriving #-}
 
 module Distribution.Server.Features.Tags.State where
-
 import Distribution.Server.Framework.Instances ()
 import Distribution.Server.Framework.MemSize
 
@@ -64,11 +63,38 @@ data PackageTags = PackageTags {
     -- the primary index
     packageTags :: Map PackageName (Set Tag),
     -- a secondary reverse mapping
-    tagPackages :: Map Tag (Set PackageName)
+    tagPackages :: Map Tag (Set PackageName),
+    -- Packagename (Proposed Additions, Proposed Deletions)
+    reviewTags :: Map PackageName (Set Tag, Set Tag)
 } deriving (Eq, Show, Typeable)
 
+
+data TagAlias = TagAlias (Map Tag (Set Tag)) deriving (Eq, Show, Typeable)
+
+addTagAlias :: Tag -> Tag -> Update TagAlias ()
+addTagAlias tag alias = do
+        TagAlias  m <- get
+        put (TagAlias (Map.insertWith Set.union tag (Set.singleton alias) m))
+
+lookupTagAlias :: Tag -> Query TagAlias (Maybe (Set Tag))
+lookupTagAlias tag
+    = do TagAlias m <- ask
+         return (Map.lookup tag m)
+
+getTagAlias :: Tag -> Query TagAlias Tag
+getTagAlias tag
+    = do TagAlias m <- ask
+         if tag `elem` Map.keys m
+            then return tag
+            else if tag `Set.member` foldr Set.union Set.empty (Map.elems m)
+                then return $ head (Map.keys $ Map.filter (tag `Set.member`) m)
+                else return tag
+
 emptyPackageTags :: PackageTags
-emptyPackageTags = PackageTags Map.empty Map.empty
+emptyPackageTags = PackageTags Map.empty Map.empty Map.empty
+
+emptyTagAlias :: TagAlias
+emptyTagAlias = TagAlias Map.empty
 
 tagToPackages :: Tag -> PackageTags -> Set PackageName
 tagToPackages tag = Map.findWithDefault Set.empty tag . tagPackages
@@ -77,36 +103,40 @@ packageToTags :: PackageName -> PackageTags -> Set Tag
 packageToTags pkg = Map.findWithDefault Set.empty pkg . packageTags
 
 alterTags :: PackageName -> Maybe (Set Tag) -> PackageTags -> PackageTags
-alterTags name mtagList (PackageTags tags packages) =
+alterTags name mtagList pt@(PackageTags tags packages _) =
     let tagList = fromMaybe Set.empty mtagList
         oldTags = Map.findWithDefault Set.empty name tags
         adjustPlusTags pkgMap tag' = addSetMap tag' name pkgMap
         adjustMinusTags pkgMap tag' = removeSetMap tag' name pkgMap
         packages' = flip (foldl' adjustPlusTags) (Set.toList $ Set.difference tagList oldTags)
                   $ foldl' adjustMinusTags packages (Set.toList $ Set.difference oldTags tagList)
-    in PackageTags (Map.alter (const mtagList) name tags) packages'
+    in pt{
+        packageTags = Map.alter (const mtagList) name tags,
+        tagPackages = packages'
+    }
 
 setTags :: PackageName -> Set Tag -> PackageTags -> PackageTags
 setTags pkgname tagList = alterTags pkgname (keepSet tagList)
 
+setAliases :: Tag -> Set Tag -> TagAlias -> TagAlias
+setAliases tag aliases (TagAlias ta) = TagAlias (Map.insertWith Set.union tag aliases ta)
+
 deletePackageTags :: PackageName -> PackageTags -> PackageTags
 deletePackageTags name = alterTags name Nothing
 
 addTag :: PackageName -> Tag -> PackageTags -> Maybe PackageTags
-addTag name tag (PackageTags tags packages) =
+addTag name tag (PackageTags tags packages review) =
     let existing = Map.findWithDefault Set.empty name tags
-    in case tag `Set.member` existing of
-        True  -> Nothing
-        False -> Just $ PackageTags (addSetMap name tag tags)
-                                    (addSetMap tag name packages)
+    in if tag `Set.member` existing then Nothing else Just $ PackageTags (addSetMap name tag tags)
+                                   (addSetMap tag name packages)
+                                   review
 
 removeTag :: PackageName -> Tag -> PackageTags -> Maybe PackageTags
-removeTag name tag (PackageTags tags packages) =
+removeTag name tag (PackageTags tags packages review) =
     let existing = Map.findWithDefault Set.empty name tags
-    in case tag `Set.member` existing of
-        True -> Just $ PackageTags (removeSetMap name tag tags)
-                                   (removeSetMap tag name packages)
-        False -> Nothing
+    in if tag `Set.member` existing then Just $ PackageTags (removeSetMap name tag tags)
+                                  (removeSetMap tag name packages)
+                                  review else Nothing
 
 addSetMap :: (Ord k, Ord a) => k -> a -> Map k (Set a) -> Map k (Set a)
 addSetMap key val = Map.alter (Just . Set.insert val . fromMaybe Set.empty) key
@@ -115,14 +145,14 @@ removeSetMap :: (Ord k, Ord a) => k -> a -> Map k (Set a) -> Map k (Set a)
 removeSetMap key val = Map.update (keepSet . Set.delete val) key
 
 alterTag :: Tag -> Maybe (Set PackageName) -> PackageTags -> PackageTags
-alterTag tag mpkgList (PackageTags tags packages) =
+alterTag tag mpkgList (PackageTags tags packages review) =
     let pkgList = fromMaybe Set.empty mpkgList
         oldPkgs = Map.findWithDefault Set.empty tag packages
         adjustPlusPkgs tagMap name' = addSetMap name' tag tagMap
         adjustMinusPkgs tagMap name' = removeSetMap name' tag tagMap
         tags' = flip (foldl' adjustPlusPkgs) (Set.toList $ Set.difference pkgList oldPkgs)
               $ foldl' adjustMinusPkgs tags (Set.toList $ Set.difference oldPkgs pkgList)
-    in PackageTags tags' (Map.alter (const mpkgList) tag packages)
+    in PackageTags tags' (Map.alter (const mpkgList) tag packages) review
 
 keepSet :: Ord a => Set a -> Maybe (Set a)
 keepSet s = if Set.null s then Nothing else Just s
@@ -135,19 +165,20 @@ deleteTag :: Tag -> PackageTags -> PackageTags
 deleteTag tag = alterTag tag Nothing
 
 renameTag :: Tag -> Tag -> PackageTags -> PackageTags
-renameTag tag tag' pkgTags@(PackageTags _ packages) =
+renameTag tag tag' pkgTags@(PackageTags _ packages _) =
     let oldPkgs = Map.findWithDefault Set.empty tag packages
     in setTag tag' oldPkgs . deleteTag tag $ pkgTags
 -------------------------------------------------------------------------------
 
 $(deriveSafeCopy 0 'base ''Tag)
 $(deriveSafeCopy 0 'base ''PackageTags)
+$(deriveSafeCopy 0 'base ''TagAlias)
 
 instance NFData PackageTags where
-    rnf (PackageTags a b) = rnf a `seq` rnf b
+    rnf (PackageTags a b c) = rnf a `seq` rnf b `seq` rnf c
 
 instance MemSize PackageTags where
-    memSize (PackageTags a b) = memSize2 a b
+    memSize (PackageTags a b c) = memSize3 a b c
 
 initialPackageTags :: PackageTags
 initialPackageTags = emptyPackageTags
@@ -167,12 +198,20 @@ getPackageTags = ask
 replacePackageTags :: PackageTags -> Update PackageTags ()
 replacePackageTags = put
 
+getTagAliasesState :: Query TagAlias TagAlias
+getTagAliasesState = ask
+
+addTagAliasesState :: TagAlias -> Update TagAlias ()
+addTagAliasesState = put
+
+
 setPackageTags :: PackageName -> Set Tag -> Update PackageTags ()
 setPackageTags name tagList = modify $ setTags name tagList
 
 setTagPackages :: Tag -> Set PackageName -> Update PackageTags ()
 setTagPackages tag pkgList = modify $ setTag tag pkgList
 
+
 -- | Tag a package. Returns True if the element was inserted, and False if
 -- the tag as already present (same result though)
 addPackageTag :: PackageName -> Tag -> Update PackageTags Bool
@@ -191,7 +230,37 @@ removePackageTag name tag = do
         Nothing -> return False
         Just pkgTags' -> put pkgTags' >> return True
 
-makeAcidic ''PackageTags ['tagsForPackage
+clearReviewTags :: PackageName -> Update PackageTags ()
+clearReviewTags pkgname = do
+        PackageTags p t r <- get
+        put (PackageTags p t (Map.insert pkgname (Set.empty,Set.empty) r))
+
+insertReviewTags :: PackageName -> Set Tag -> Set Tag -> Update PackageTags ()
+insertReviewTags pkgname add del = do
+        PackageTags p t r <- get
+        put (PackageTags p t (Map.insertWith insertReviewHelper pkgname (add,del) r))
+
+insertReviewTags' :: PackageName -> Set Tag -> Set Tag -> Update PackageTags ()
+insertReviewTags' pkgname add del = do
+        PackageTags p t r <- get
+        put (PackageTags p t (Map.insert pkgname (add,del) r))
+
+
+insertReviewHelper :: (Set Tag, Set Tag) -> (Set Tag, Set Tag) -> (Set Tag, Set Tag)
+insertReviewHelper (a,b) (c,d) = (Set.union a c, Set.union b d)
+
+lookupReviewTags :: PackageName -> Query PackageTags (Set Tag, Set Tag)
+lookupReviewTags pkgname = asks $ Map.findWithDefault (Set.empty, Set.empty) pkgname . reviewTags
+
+
+$(makeAcidic ''TagAlias ['addTagAlias
+                        ,'getTagAlias
+                        ,'lookupTagAlias
+                        ,'addTagAliasesState
+                        ,'getTagAliasesState
+                      ])
+
+$(makeAcidic ''PackageTags ['tagsForPackage
                          ,'packagesForTag
                          ,'getTagList
                          ,'getPackageTags
@@ -200,5 +269,10 @@ makeAcidic ''PackageTags ['tagsForPackage
                          ,'setTagPackages
                          ,'addPackageTag
                          ,'removePackageTag
-                         ]
+                         ,'insertReviewTags
+                         ,'insertReviewTags'
+                         ,'lookupReviewTags
+                         ,'clearReviewTags
+                         ])
+
 
diff --git a/Distribution/Server/Features/Upload.hs b/Distribution/Server/Features/Upload.hs
index 2a8196e87..20c1bd07d 100644
--- a/Distribution/Server/Features/Upload.hs
+++ b/Distribution/Server/Features/Upload.hs
@@ -302,7 +302,6 @@ uploadFeature ServerEnv{serverBlobStore = store}
     guardAuthorisedAsMaintainerOrTrustee pkgname =
       guardAuthorised_ [InGroup (maintainersGroup pkgname), InGroup trusteesGroup]
 
-
     ----------------------------------------------------
 
     -- This is the upload function. It returns a generic result for multiple formats.
@@ -431,4 +430,3 @@ packageIdExistsModuloNormalisedVersion pkgs pkg =
         n vs' = case dropWhileEnd (== 0) vs' of
             []   -> [0]
             vs'' -> vs''
-
diff --git a/Distribution/Server/Features/Users.hs b/Distribution/Server/Features/Users.hs
index ae4431398..203d902b1 100644
--- a/Distribution/Server/Features/Users.hs
+++ b/Distribution/Server/Features/Users.hs
@@ -5,7 +5,6 @@ module Distribution.Server.Features.Users (
     initUserFeature,
     UserFeature(..),
     UserResource(..),
-
     GroupResource(..),
   ) where
 
@@ -61,8 +60,11 @@ data UserFeature = UserFeature {
     guardAuthorised_   :: [PrivilegeCondition] -> ServerPartE (),
     -- | Require any of a set of privileges, giving the id of the current user.
     guardAuthorised    :: [PrivilegeCondition] -> ServerPartE UserId,
+    guardAuthorised'    :: [PrivilegeCondition] -> ServerPartE Bool,
     -- | Require being logged in, giving the id of the current user.
     guardAuthenticated :: ServerPartE UserId,
+    -- | Gets the authentication if it exists.
+    checkAuthenticated :: ServerPartE (Maybe (UserId, UserInfo)),
     -- | A hook to override the default authentication error in particular
     -- circumstances.
     authFailHook       :: Hook Auth.AuthError (Maybe ErrorResponse),
@@ -389,6 +391,13 @@ userFeature templates usersState adminsState
         Auth.guardPriviledged users uid privconds
         return uid
 
+    guardAuthorised' :: [PrivilegeCondition] -> ServerPartE Bool
+    guardAuthorised' privconds = do
+        users <- queryGetUserDb
+        uid   <- guardAuthenticatedWithErrHook users
+        valid <- Auth.checkPriviledged users uid privconds
+        return valid
+
     -- Simply check if the user is authenticated as some user, without any
     -- check that they have any particular priveledges. Only useful as a
     -- building block.
@@ -412,6 +421,11 @@ userFeature templates usersState adminsState
           overrideResponse <- msum <$> runHook authFailHook err
           throwError (fromMaybe defaultResponse overrideResponse)
 
+    -- Check if there is an authenticated userid, and return info, if so.
+    checkAuthenticated :: ServerPartE (Maybe (UserId, UserInfo))
+    checkAuthenticated = do
+        users <- queryGetUserDb
+        either (const Nothing) Just `fmap` Auth.checkAuthenticated Auth.hackageRealm users
 
     -- | Resources representing the collection of known users.
     --
@@ -501,7 +515,7 @@ userFeature templates usersState adminsState
       ok $ toResponse $
         template
           [ "username" $= display (userName uinfo)
-          , "tokens"   $= 
+          , "tokens"   $=
               [ templateDict
                   [ templateVal "hash" (display authtok)
                   , templateVal "description" desc
diff --git a/Distribution/Server/Features/Votes.hs b/Distribution/Server/Features/Votes.hs
index a9cdbb0a5..97a406005 100644
--- a/Distribution/Server/Features/Votes.hs
+++ b/Distribution/Server/Features/Votes.hs
@@ -16,7 +16,6 @@ import Distribution.Server.Framework.BackupRestore
 import Distribution.Server.Features.Core
 import Distribution.Server.Features.Users
 import Distribution.Server.Users.Types (UserId(..))
-import Distribution.Server.Users.UserIdSet as UserIdSet
 
 import Distribution.Package
 import Distribution.Text
@@ -26,15 +25,19 @@ import qualified Data.Map as Map
 import qualified Data.Text as T
 import qualified Data.HashMap.Strict as HashMap
 
+import Control.Monad (when)
 import Control.Arrow (first)
 import qualified Text.XHtml.Strict as X
 
 
 -- | Define the prototype for this feature
 data VotesFeature = VotesFeature {
-    votesFeatureInterface :: HackageFeature
+    votesFeatureInterface   :: HackageFeature
   , didUserVote             :: forall m. MonadIO m => PackageName -> UserId -> m Bool
   , pkgNumVotes             :: forall m. MonadIO m => PackageName -> m Int
+  , pkgNumScore             :: forall m. MonadIO m => PackageName -> m Float
+  , pkgUserVote             :: forall m. MonadIO m => PackageName -> UserId -> m (Maybe Score)
+  , votesUpdated            :: Hook (PackageName, Float) ()
   , renderVotesHtml         :: PackageName -> ServerPartE X.Html
 }
 
@@ -49,11 +52,13 @@ initVotesFeature :: ServerEnv
                       -> IO VotesFeature)
 initVotesFeature env@ServerEnv{serverStateDir} = do
   dbVotesState      <- votesStateComponent serverStateDir
+  updateVotes       <- newHook
 
   return $ \coref@CoreFeature{..} userf@UserFeature{..} -> do
     let feature = votesFeature env
                   dbVotesState
-                  coref userf
+                  coref userf updateVotes
+
     return feature
 
 -- | Define the backing store (i.e. database component)
@@ -79,12 +84,14 @@ votesFeature ::  ServerEnv
              -> StateComponent AcidState VotesState
              -> CoreFeature                    -- To get site package list
              -> UserFeature                    -- To authenticate users
+             -> Hook (PackageName, Float) ()
              -> VotesFeature
 
 votesFeature  ServerEnv{..}
               votesState
               CoreFeature { coreResource = CoreResource{..} }
               UserFeature{..}
+              votesUpdated
   = VotesFeature{..}
   where
     votesFeatureInterface   = (emptyHackageFeature "votes") {
@@ -111,7 +118,7 @@ votesFeature  ServerEnv{..}
                         , (DELETE,  "Remove a user's vote from this package")
                         ]
     , resourceGet     = [("json", servePackageNumVotesGet)]
-    , resourcePut     = [("",     servePackageVotePut)]
+    , resourcePost     = [("",     servePackageVotePut)]
     , resourceDelete  = [("",     servePackageVoteDelete)]
     }
 
@@ -123,8 +130,7 @@ votesFeature  ServerEnv{..}
       cacheControlWithoutETag [Public, maxAgeMinutes 10]
       votesMap <- queryState votesState GetAllPackageVoteSets
       ok . toResponse $ objectL
-        [ (display pkgname, toJSON (UserIdSet.size voterset))
-        | (pkgname, voterset) <- Map.toList votesMap ]
+        [ (display pkgname, toJSON (votesScore pkgMap)) | (pkgname, pkgMap) <- Map.toList votesMap ]
 
     -- Get the number of votes a package has. If the package
     -- has never been voted for, returns 0.
@@ -133,7 +139,7 @@ votesFeature  ServerEnv{..}
       pkgname <- packageInPath dpath
       guardValidPackageName pkgname
       cacheControlWithoutETag [Public, maxAgeMinutes 10]
-      voteCount <- queryState votesState (GetPackageVoteCount pkgname)
+      voteCount <- pkgNumVotes pkgname
       let obj = objectL
                   [ ("packageName", string $ display pkgname)
                   , ("numVotes",    toJSON voteCount)
@@ -146,12 +152,12 @@ votesFeature  ServerEnv{..}
       uid     <- guardAuthorised [AnyKnownUser]
       pkgname <- packageInPath dpath
       guardValidPackageName pkgname
-
-      success <- updateState votesState (AddVote pkgname uid)
-      if success
-        then ok . toResponse $ Render.voteConfirmationPage pkgname
-                                 "Package voted for successfully"
-        else ok . toResponse $ Render.alreadyVotedPage pkgname
+      score <- look "score"
+      let score' = read score :: Int
+      _ <- updateState votesState (AddVote pkgname uid score')
+      pkgScore <- pkgNumScore pkgname
+      runHook_ votesUpdated (pkgname, pkgScore)
+      ok . toResponse $ "Package voted for successfully"
 
     -- Removes a user's vote from a package. If the user has not voted
     -- for this package, does nothing.
@@ -160,13 +166,12 @@ votesFeature  ServerEnv{..}
       uid     <- guardAuthorised [AnyKnownUser]
       pkgname <- packageInPath dpath
       guardValidPackageName pkgname
-
       success <- updateState votesState (RemoveVote pkgname uid)
-
+      pkgScore <- pkgNumScore pkgname
+      when success $ runHook_ votesUpdated (pkgname, pkgScore)
       let responseMsg | success   = "Package vote removed successfully."
                       | otherwise = "User has not voted for this package."
-      ok . toResponse $ Render.voteConfirmationPage
-        pkgname responseMsg
+      ok . toResponse $ responseMsg
 
     -- Helper Functions (Used outside of responses, e.g. by other features.)
 
@@ -181,6 +186,14 @@ votesFeature  ServerEnv{..}
     pkgNumVotes pkgname =
       queryState votesState (GetPackageVoteCount pkgname)
 
+    pkgNumScore :: MonadIO m => PackageName -> m Float
+    pkgNumScore pkgname =
+      queryState votesState (GetPackageVoteScore pkgname)
+
+    pkgUserVote :: MonadIO m => PackageName -> UserId -> m (Maybe Score)
+    pkgUserVote pkgname uid =
+      queryState votesState (GetPackageUserVote pkgname uid)
+
     -- Renders the HTML for the "Votes:" section on package pages.
     renderVotesHtml :: PackageName -> ServerPartE X.Html
     renderVotesHtml pkgname = do
diff --git a/Distribution/Server/Features/Votes/State.hs b/Distribution/Server/Features/Votes/State.hs
index 4511742b2..24ca0c71a 100644
--- a/Distribution/Server/Features/Votes/State.hs
+++ b/Distribution/Server/Features/Votes/State.hs
@@ -7,24 +7,22 @@ import Distribution.Server.Framework.MemSize
 
 import Distribution.Package (PackageName)
 import Distribution.Server.Users.Types (UserId)
-import Distribution.Server.Users.UserIdSet (UserIdSet)
-import qualified Distribution.Server.Users.UserIdSet as UserIdSet
-
 import Distribution.Server.Users.State ()
 
 import Data.Typeable
 import Data.Map (Map)
 import qualified Data.Map as Map
+import Data.List
 import Data.Maybe (fromMaybe)
-
+import Control.Arrow ((&&&))
 import Data.Acid     (Query, Update, makeAcidic)
 import Data.SafeCopy (base, deriveSafeCopy)
 
 import qualified Control.Monad.State as State
 import Control.Monad.Reader.Class (ask)
 
-
-newtype VotesState = VotesState { votesMap :: Map PackageName UserIdSet }
+type Score = Int
+newtype VotesState = VotesState (Map PackageName  (Map UserId Score))
   deriving (Show, Eq, Typeable, MemSize)
 
 $(deriveSafeCopy 0 'base ''VotesState)
@@ -33,29 +31,35 @@ initialVotesState :: VotesState
 initialVotesState = VotesState Map.empty
 
 -- helper function
-userVotedForPackage :: PackageName -> UserId -> Map PackageName UserIdSet -> Bool
+userVotedForPackage :: PackageName -> UserId -> Map PackageName (Map UserId Score) -> Bool
 userVotedForPackage pkgname uid votes =
     case Map.lookup pkgname votes of
       Nothing     -> False
-      Just uidset -> UserIdSet.member uid uidset
+      Just m -> case Map.lookup uid m of
+                  Nothing -> False
+                  Just _ -> True
+
+-- Using La Placian rule of succession to calculate scoring
+votesScore :: Map UserId Score -> Float
+votesScore m =
+    let grouping = map (head &&& length) . group . sort . Map.elems $ m
+        score =  fromIntegral (sum $ map (uncurry (*)) grouping) / fromIntegral (4 + foldr (\(_,b) -> (+b) ) 0 grouping)
+    in score*10
 
 -- All the acid state transactions
 
-addVote :: PackageName -> UserId -> Update VotesState Bool
-addVote pkgname uid = do
+addVote :: PackageName -> UserId -> Score -> Update VotesState Float
+addVote pkgname uid score = do
     VotesState votes <- State.get
-    if userVotedForPackage pkgname uid votes
-      then return False
-      else do let votes' = Map.alter insert pkgname votes
-                  insert = Just . UserIdSet.insert uid . fromMaybe UserIdSet.empty
-              State.put $! VotesState votes'
-              return True
+    let votes' = Map.insertWith Map.union pkgname (Map.singleton uid score) votes
+    State.put $! VotesState votes'
+    return $ votesScore $ fromMaybe Map.empty $ Map.lookup pkgname votes'
 
 removeVote :: PackageName -> UserId -> Update VotesState Bool
 removeVote pkgname uid = do
     VotesState votes <- State.get
     if userVotedForPackage pkgname uid votes
-       then do let votes' = Map.adjust (UserIdSet.delete uid) pkgname votes
+       then do let votes' = Map.adjust (Map.delete uid) pkgname votes
                State.put $! VotesState votes'
                return True
        else return False
@@ -65,14 +69,26 @@ getPackageVoteCount pkgname = do
     VotesState votes <- ask
     case Map.lookup pkgname votes of
       Nothing     -> return 0
-      Just uidset -> return $! UserIdSet.size uidset
+      Just m -> return $! Map.size m
+
+getPackageVoteScore :: PackageName -> Query VotesState Float
+getPackageVoteScore pkgname = do
+    VotesState votes <- ask
+    case Map.lookup pkgname votes of
+      Nothing     -> return 0
+      Just m -> return $! votesScore m
 
 getPackageUserVoted :: PackageName -> UserId -> Query VotesState Bool
 getPackageUserVoted pkgname uid = do
     VotesState votes <- ask
     return $! userVotedForPackage pkgname uid votes
 
-getAllPackageVoteSets :: Query VotesState (Map PackageName UserIdSet)
+getPackageUserVote :: PackageName -> UserId -> Query VotesState (Maybe Score)
+getPackageUserVote pkgname uid = do
+    VotesState votes <- ask
+    return $! Map.lookup uid =<< Map.lookup pkgname votes
+
+getAllPackageVoteSets :: Query VotesState (Map PackageName (Map UserId Score))
 getAllPackageVoteSets = do
     VotesState votes <- ask
     return votes
@@ -91,7 +107,9 @@ makeAcidic
   [ 'addVote
   , 'removeVote
   , 'getPackageVoteCount
+  , 'getPackageVoteScore
   , 'getPackageUserVoted
+  , 'getPackageUserVote
   , 'getAllPackageVoteSets
   , 'getVotesState
   , 'replaceVotesState
diff --git a/Distribution/Server/Framework/MemSize.hs b/Distribution/Server/Framework/MemSize.hs
index 45788b71a..335c00f3e 100644
--- a/Distribution/Server/Framework/MemSize.hs
+++ b/Distribution/Server/Framework/MemSize.hs
@@ -2,14 +2,18 @@
 module Distribution.Server.Framework.MemSize (
   MemSize(..),
   memSizeMb, memSizeKb,
-  memSize0, memSize1, memSize2, memSize3, memSize4,
-  memSize5, memSize6, memSize7, memSize8, memSize9, memSize10,
+  memSize0, memSize1, memSize2, memSize3, memSize4, memSize5,
+  memSize6, memSize7, memSize8, memSize9, memSize10, memSize11, memSize13,
   memSizeUArray, memSizeUVector
   ) where
 
 import Data.Word
 import qualified Data.Map as Map
 import Data.Map (Map)
+import qualified Data.Bimap as Bimap
+import Data.Bimap (Bimap)
+import qualified Data.Graph as Gr
+import Data.Graph (Graph)
 import qualified Data.IntMap as IntMap
 import Data.IntMap (IntMap)
 import qualified Data.Set as Set
@@ -60,8 +64,8 @@ memSize7 :: (MemSize a6, MemSize a5, MemSize a4, MemSize a3, MemSize a2, MemSize
 memSize8 :: (MemSize a7, MemSize a6, MemSize a5, MemSize a4, MemSize a3, MemSize a2, MemSize a1, MemSize a) => a -> a1 -> a2 -> a3 -> a4 -> a5 -> a6 -> a7 -> Int
 memSize9 :: (MemSize a8, MemSize a7, MemSize a6, MemSize a5, MemSize a4, MemSize a3, MemSize a2, MemSize a1, MemSize a) => a -> a1 -> a2 -> a3 -> a4 -> a5 -> a6 -> a7 -> a8 -> Int
 memSize10 :: (MemSize a9, MemSize a8, MemSize a7, MemSize a6, MemSize a5, MemSize a4, MemSize a3, MemSize a2, MemSize a1, MemSize a) => a -> a1 -> a2 -> a3 -> a4 -> a5 -> a6 -> a7 -> a8 -> a9 -> Int
-
-
+memSize11 :: (MemSize a10, MemSize a9, MemSize a8, MemSize a7, MemSize a6, MemSize a5, MemSize a4, MemSize a3, MemSize a2, MemSize a1, MemSize a) => a -> a1 -> a2 -> a3 -> a4 -> a5 -> a6 -> a7 -> a8 -> a9 -> a10 -> Int
+memSize13 :: (MemSize a12, MemSize a11, MemSize a10, MemSize a9, MemSize a8, MemSize a7, MemSize a6, MemSize a5, MemSize a4, MemSize a3, MemSize a2, MemSize a1, MemSize a) => a -> a1 -> a2 -> a3 -> a4 -> a5 -> a6 -> a7 -> a8 -> a9 -> a10 -> a11 -> a12 ->Int
 memSize0             = 0
 memSize1 a           = 2 + memSize a
 memSize2 a b         = 3 + memSize a + memSize b
@@ -90,6 +94,20 @@ memSize10 a b c d e
                           + memSize g + memSize h + memSize i
                           + memSize j
 
+memSize11 a b c d e
+          f g h i j k= 12 + memSize a + memSize b + memSize c
+                          + memSize d + memSize e + memSize f
+                          + memSize g + memSize h + memSize i
+                          + memSize j + memSize k
+
+memSize13 a b c d e f g
+          h i j k l m= 14 + memSize a + memSize b + memSize c
+                          + memSize d + memSize e + memSize f
+                          + memSize g + memSize h + memSize i
+                          + memSize j + memSize k + memSize l
+                          + memSize m
+
+
 instance MemSize (a -> b) where
   memSize _ = 0
 
@@ -145,9 +163,15 @@ instance (MemSize a, MemSize b) => MemSize (Either a b) where
 instance (MemSize a, MemSize b) => MemSize (Map a b) where
   memSize m = sum [ 6 + memSize k + memSize v | (k,v) <- Map.toList m ]
 
+instance (MemSize a, MemSize b) => MemSize (Bimap a b) where
+  memSize m = sum [ 6 + memSize k + memSize v | (k,v) <- Bimap.toList m ]
+
 instance MemSize a => MemSize (IntMap a) where
   memSize m = sum [ 8 + memSize v | v <- IntMap.elems m ]
 
+instance MemSize Graph where
+  memSize m = sum [ 6 + memSize v | v <- Gr.edges m ]
+
 instance MemSize a => MemSize (Set a) where
   memSize m = sum [ 5 + memSize v | v <- Set.elems m ]
 
diff --git a/Distribution/Server/Packages/Render.hs b/Distribution/Server/Packages/Render.hs
index 73d1b95e6..691f09ca5 100644
--- a/Distribution/Server/Packages/Render.hs
+++ b/Distribution/Server/Packages/Render.hs
@@ -120,7 +120,7 @@ doPackageRender users info = PackageRender
         isBuildable ctData = if buildable $ getBuildInfo ctData
                                then Buildable
                                else NotBuildable
-    
+
     moduleHasDocs :: Maybe TarIndex -> ModuleName -> Bool
     moduleHasDocs Nothing       = const False
     moduleHasDocs (Just doctar) = isJust . TarIndex.lookup doctar
@@ -149,8 +149,9 @@ data IsBuildable = Buildable
 
 categorySplit :: String -> [String]
 categorySplit xs | all isSpace xs = []
-categorySplit xs = map (dropWhile isSpace) $ splitOn ',' xs
+categorySplit xs = if last res == "" then init res else res
   where
+    res = map (dropWhile isSpace) $ splitOn ',' xs
     splitOn x ys = front : case back of
                            [] -> []
                            (_:ys') -> splitOn x ys'
diff --git a/Distribution/Server/Pages/Index.hs b/Distribution/Server/Pages/Index.hs
index 09ff5822b..152e8e9fa 100644
--- a/Distribution/Server/Pages/Index.hs
+++ b/Distribution/Server/Pages/Index.hs
@@ -1,6 +1,6 @@
 -- Generate an HTML page listing all available packages
 
-module Distribution.Server.Pages.Index (packageIndex) where
+module Distribution.Server.Pages.Index where
 
 import Distribution.Server.Pages.Template       ( hackagePage )
 import Distribution.Server.Pages.Util           ( packageType )
@@ -21,7 +21,6 @@ import qualified Text.XHtml.Strict as XHtml ( name )
 import Data.Char (toLower, toUpper, isSpace)
 import Data.List (intersperse, sortBy, groupBy, nub, maximumBy)
 
-
 packageIndex :: PackageIndex.PackageIndex PkgInfo -> Html
 packageIndex = formatPkgGroups
                  . map (mkPackageIndexInfo
@@ -30,6 +29,15 @@ packageIndex = formatPkgGroups
                       . maximumBy (comparing packageVersion))
                  . PackageIndex.allPackagesByName
 
+toPackageNames :: PackageIndex.PackageIndex PkgInfo -> [PackageName]
+toPackageNames = map (pii_pkgName
+                      . mkPackageIndexInfo
+                      . flattenPackageDescription
+                      . pkgDesc
+                      . maximumBy (comparing packageVersion))
+                 . PackageIndex.allPackagesByName
+
+
 data PackageIndexInfo = PackageIndexInfo {
                             pii_pkgName :: !PackageName,
                             pii_categories :: ![Category],
diff --git a/Distribution/Server/Pages/Reverse.hs b/Distribution/Server/Pages/Reverse.hs
index 35d110391..e2252aa4f 100644
--- a/Distribution/Server/Pages/Reverse.hs
+++ b/Distribution/Server/Pages/Reverse.hs
@@ -1,14 +1,12 @@
+{-# LANGUAGE NamedFieldPuns, RecordWildCards #-}
 module Distribution.Server.Pages.Reverse (
-    reversePackageRender,
-    reverseFlatRender,
-    reverseStatsRender,
-    reversePackagesRender,
-    reversePackageSummary
+    ReverseHtmlUtil(..),
+    reverseHtmlUtil
   ) where
 
 import Distribution.Server.Features.ReverseDependencies
-import Distribution.Server.Packages.Reverse
-import Distribution.Server.Packages.Preferred
+import Distribution.Server.Features.PreferredVersions
+
 
 import Distribution.Package
 import Distribution.Text (display)
@@ -17,161 +15,168 @@ import Distribution.Version
 import qualified Data.Map as Map
 
 import Text.XHtml.Strict
-
-reversePackageRender :: PackageId -- ^ The package whose information is displayed.
-                     -> (PackageId -> String) -- ^ Generating URIs for package pages.
-                     -> ReverseResource -- ^ The resource for generating revdeps-related URIs.
-                     -> Bool -- ^ Whether the ReverseDisplay was rendered for recent (True) or older (False) versions of the package.
-                     -> ReversePageRender -- ^ Obtained from a ReverseDisplay-rendering function.
-                     -> [Html]
-reversePackageRender pkgid packageLink r isRecent (ReversePageRender renders counts total) =
-    let packageAnchor = anchor ! [href $ packageLink pkgid] << display pkgid
-        hasVersion = packageVersion pkgid /= Version [] []
-        pkgname = packageName pkgid
-        statLinks = paragraph <<
-          [ toHtml "Check out the "
-          , anchor ! [href $ reverseStatsUri r "" pkgname] << "statistics for specific versions"
-          , toHtml $ " of " ++ display pkgid ++ " and its "
-          , anchor ! [href $ reverseAllUri r "" pkgname] << "indirect dependencies", toHtml "." ]
-        versionBox = if hasVersion && total /= allCounts
-            then thediv ! [theclass "notification"] << [toHtml $ "These statistics only apply to this version of " ++ display pkgname ++ ". See also ",  anchor ! [href $ reverseNameUri r "" pkgname] << [toHtml "packages which depend on ", emphasize << "any", toHtml " version"], toHtml $ " (all " ++ show total ++ " of them)."]
-            else noHtml
-        allCounts = fst counts + snd counts
-        otherCount = case total - allCounts of
-            diff | diff > 0 -> paragraph << [show diff ++ " packages depend on versions of " ++ display pkgid ++ " other than this one."]
-            _ -> noHtml
-        (pageText, nonPageText) = (if isRecent then id else uncurry $ flip (,)) (recentText, nonRecentText)
-        otherLink = if isRecent then reverseOldUri r "" pkgid else reverseUri r "" pkgid
-    in h2 << (display pkgid ++ ": " ++ num allCounts "reverse dependencies" "reverse dependency"):versionBox:case counts of
-    (0, 0) ->
-      [ paragraph << [toHtml "No packages depend on ",
-                      packageAnchor, toHtml "."]
-      ]
-    (0, count) ->
-      [ paragraph << [toHtml "No packages depend on ",
-                      if hasVersion then noHtml else toHtml "some version of ",
-                      packageAnchor,
-                      toHtml $ pageText 0 ++ " However, ",
-                      altVersions count nonPageText otherLink,
-                      toHtml "."]
-      ] ++ [otherCount, statLinks]
-    (count, count') ->
-      [ (paragraph<<) $ [ mainVersions count pageText packageAnchor, toHtml " (listed below)." ]
-        ++ if count' > 0 then [ toHtml " Additionally, "
-                              , altVersions count' nonPageText otherLink
-                              , toHtml $ ". That's " ++ show (count+count') ++ " in total." ]
-                         else []
-      ] ++ (if isRecent then [] else [paragraph << oldText]) ++ [otherCount, statLinks, reverseTable]
-  where
-    mainVersions count textFunc pkgLink = toHtml
-       [ toHtml $ num count "packages depend on " "package depends on "
-       , pkgLink
-       , toHtml $ textFunc count
-       ]
-    altVersions count textFunc altLink = toHtml
-       [ anchor ! [href altLink] << num count "packages" "package"
-       , toHtml  $ num' count " depend on " " depends on " ++ display pkgid ++ textFunc count
-       ]
-    recentText count    = ' ':num' count "in their latest versions" "in its latest version"
-    nonRecentText count = ' ':num' count "only in older or deprecated versions" "only in an older or deprecated version"
-    oldText = "The latest version of each package below, which doesn't depend on " ++ display pkgid ++ ", is linked from the first column. The version linked from the second column is the one which has a dependency on " ++ display pkgid ++", but it's no longer the preferred installation candidate. Note that packages which depend on versions of " ++ display pkgid ++ " not uploaded to Hackage are treated as not depending on it at all."
-
-    reverseTable = thediv << table << reverseTableRows
-    reverseTableRows =
-        [ tr << [ th << "Package name", th << "Version", th << "Reverse dependencies" ] ] ++
-        [ tr ! [theclass (if odd n then "odd" else "even")] <<
-            [ td << anchor ! [href $ packageLink $ PackageIdentifier (packageName pkg) $ Version [] [] ] << display (packageName pkg)
-            , td << anchor ! (renderStatus status ++ [href $ packageLink pkg]) << display (packageVersion pkg)
-            , td << [ toHtml $ (show count) ++ " (", anchor ! [href $ reverseNameUri r "" $ packageName pkg] << "view", toHtml ")" ] ]
-        | (ReverseRender pkg status count, n) <- zip renders [(1::Int)..] ]
-
-    renderStatus (Just DeprecatedVersion) = [theclass "deprecated"]
-    renderStatus (Just UnpreferredVersion) = [theclass "unpreferred"]
-    renderStatus _ = []
-
-reverseFlatRender :: PackageName -> (PackageName -> String) -> ReverseResource -> ReverseCount -> [(PackageName, Int)] -> [Html]
-reverseFlatRender pkgname packageLink r (ReverseCount total flat _) pairs =
-  h2 << (display pkgname ++ ": " ++ num flat "total reverse dependencies" "reverse dependency"):case (total, flat) of
-    (0, 0) -> [paragraph << [toHtml "No packages depend on ", toPackage pkgname]]
-    _ ->
-      [ paragraph << if total == flat
-        then [toHtml "All packages which use ", toPackage pkgname, toHtml " depend on it ", anchor ! [href $ reverseNameUri r "" pkgname] << "directly", toHtml $ ". " ++ onlyPackage total]
-        else [toPackage pkgname, toHtml $ " has ", anchor ! [href $ reverseNameUri r "" pkgname] << num total "packages" "package", toHtml $ " which directly " ++ num' total "depend" "depends" ++ " on it, but there are more packages which depend on ", emphasize << "those", toHtml $ " packages. If you flatten the tree of reverse dependencies, you'll find " ++ show flat ++ " packages which use " ++ display pkgname ++ ", and " ++ show (flat-total) ++ " which do so without depending directly on it. All of these packages are listed below."]
-      , paragraph << [toHtml "See also the ", anchor ! [href $ reverseStatsUri r "" pkgname] << "statistics for specific versions", toHtml $ " of " ++ display pkgname ++ "."]
-      , reverseTable
-      ]
+data ReverseHtmlUtil = ReverseHtmlUtil {
+    reversePackageRender :: PackageId -> (PackageId -> String) -> Bool -> ReversePageRender -> [Html]
+  , reverseFlatRender :: PackageName -> (PackageName -> String) -> ReverseCount -> [(PackageName, Int)] -> [Html]
+  , reverseStatsRender :: PackageName -> [Version] -> (PackageId -> String) -> ReverseCount -> [Html]
+  , reversePackagesRender :: (PackageName -> String) -> Int -> [(PackageName, Int, Int)] -> [Html]
+  , reversePackageSummary :: PackageId -> (Int, Int) -> (String, Html)
+  }
+
+reverseHtmlUtil :: ReverseFeature -> ReverseHtmlUtil
+reverseHtmlUtil ReverseFeature{reverseResource} = ReverseHtmlUtil{..}
   where
-    toPackage pkg = anchor ! [href $ packageLink pkg] << display pkg
-
-    onlyPackage count = if count == 1 then "There's only one:" else "There are " ++ show count ++ ":"
-
-    reverseTable = thediv << table << reverseTableRows
-    reverseTableRows =
-        [ tr << [ th << "Package name", th << "Total reverse dependencies" ] ] ++
-        [ tr ! [theclass (if odd n then "odd" else "even")] <<
-            [ td << toPackage pkg
-            , td << [ toHtml $ (show count) ++ " (", anchor ! [href $ reverseAllUri r "" pkg] << "view", toHtml ")" ]
-            ]
-        | ((pkg, count), n) <- zip pairs [(1::Int)..] ]
-
--- /package/:package/reverse/summary
-reverseStatsRender :: PackageName -> [Version] -> (PackageId -> String) -> ReverseResource -> ReverseCount -> [Html]
-reverseStatsRender pkgname allVersions packageLink r (ReverseCount total flat versions) =
-    h2 << (display pkgname ++ ": reverse dependency statistics"):
-  [ case total of
-        0 -> paragraph << [ toHtml "No packages depend on ", thisPackage, toHtml "." ]
-        _ -> toHtml
-            [ paragraph << [ anchor ! [href $ reverseNameUri r "" pkgname] << num total "packages" "package"
-                           , toHtml $ num' total " depend" " depends"
-                           , toHtml " directly on ", thisPackage, toHtml "." ]
-            , paragraph << [ toHtml $ num (flat-total) "packages depend" "package depends" ++ " indirectly on " ++ display pkgname ++ "." ]
-            , paragraph << [ anchor ! [href $ reverseAllUri r "" pkgname] << num flat "packages" "package"
-                           , toHtml $ num' flat " depend" " depends" ++ " on " ++ display pkgname ++ " in total."
-                           ]
-            ]
-  , versionTable ]
-  where
-    toPackage pkgid = anchor ! [href $ packageLink pkgid] << display pkgid
-    thisPackage = toPackage (PackageIdentifier pkgname $ Version [] [])
-
-    versionTable = thediv << table << versionTableRows
-    versionTableRows =
-        [ tr << [ th << "Version", th << "Reverse dependency count" ] ] ++
-        [ tr ! [theclass (if odd n then "odd" else "even")] <<
-            [ td << anchor ! [href $ packageLink pkgid ] << display version
-            , td << [ toHtml $ show (Map.findWithDefault 0 version versions) ++ " ("
-                    , anchor ! [href $ reverseUri r "" pkgid] << "view", toHtml ")" ]
-            ]
-        | (version, n) <- zip allVersions [(1::Int)..], let pkgid = PackageIdentifier pkgname version ]
-
-num, num' :: Int -> String -> String -> String
-num  n plural singular  = show n ++ " " ++ num' n plural singular
-num' n plural singular = if n == 1 then singular else plural
-
--- /packages/reverse
-reversePackagesRender :: (PackageName -> String) -> ReverseResource -> Int -> [(PackageName, Int, Int)] -> [Html]
-reversePackagesRender packageLink r pkgCount triples =
-        h2 << ("Reverse dependencies") :
-      [ paragraph << [ "Hackage has " ++ show pkgCount ++ " packages. Here are all the packages that have package that depend on them:"]
-      , reverseTable ]
-  where
-    reverseTable = thediv << table << reverseTableRows
-    reverseTableRows =
-        [ tr << [ th << "Package name", th << "Total", th << "Direct" ] ] ++
-        [ tr ! [theclass (if odd n then "odd" else "even")] <<
-            [ td << anchor ! [href $ packageLink pkgname ] << display pkgname
-            , td << [ toHtml $ show flat ++ " (", anchor ! [href $ reverseStatsUri r "" pkgname ] << "view", toHtml ")" ]
-            , td << [ toHtml $ show total ++ " (", anchor ! [href $ reverseNameUri r "" pkgname ] << "view", toHtml ")" ]
-            ] -- and, indirect is flat-total, if those are ever explicitly served
-        | ((pkgname, total, flat), n) <- zip triples [(1::Int)..], flat /= 0 ]
-
-reversePackageSummary :: PackageId -> ReverseResource -> (Int, Int) -> (String, Html)
-reversePackageSummary pkgid r (direct, version) = (,) "Reverse dependencies" $
-  if direct == 0
-    then toHtml "None"
-    else toHtml [ anchor ! [href $ reverseUri r "" pkgid ] << show version
-                , toHtml " for ", toHtml . display $ packageVersion pkgid
-                , toHtml " and "
-                , anchor ! [href $ reverseNameUri r "" (packageName pkgid) ] << show direct
-                , toHtml " total"]
-
+    reversePackageRender :: PackageId -- ^ The package whose information is displayed.
+                         -> (PackageId -> String) -- ^ Generating URIs for package pages.
+                         -> Bool -- ^ Whether the ReverseDisplay was rendered for recent (True) or older (False) versions of the package.
+                         -> ReversePageRender -- ^ Obtained from a ReverseDisplay-rendering function.
+                         -> [Html]
+    reversePackageRender pkgid packageLink isRecent (ReversePageRender renders counts total) =
+        let packageAnchor = anchor ! [href $ packageLink pkgid] << display pkgid
+            hasVersion = packageVersion pkgid /= Version [] []
+            pkgname = packageName pkgid
+            statLinks = paragraph <<
+              [ toHtml "Check out the "
+              , anchor ! [href $ reverseStatsUri reverseResource "" pkgname] << "statistics for specific versions"
+              , toHtml $ " of " ++ display pkgid ++ " and its "
+              , anchor ! [href $ reverseAllUri reverseResource "" pkgname] << "indirect dependencies", toHtml "." ]
+            versionBox = if hasVersion && total /= allCounts
+                then thediv ! [theclass "notification"] << [toHtml $ "These statistics only apply to this version of " ++ display pkgname ++ ". See also ",  anchor ! [href $ reverseNameUri reverseResource "" pkgname] << [toHtml "packages which depend on ", emphasize << "any", toHtml " version"], toHtml $ " (all " ++ show total ++ " of them)."]
+                else noHtml
+            allCounts = uncurry (+) counts
+            otherCount = case total - allCounts of
+                diff | diff > 0 -> paragraph << [show diff ++ " packages depend on versions of " ++ display pkgid ++ " other than this one."]
+                _ -> noHtml
+            (pageText, nonPageText) = (if isRecent then id else uncurry $ flip (,)) (recentText, nonRecentText)
+            otherLink = if isRecent then reverseOldUri reverseResource "" pkgid else reverseUri reverseResource "" pkgid
+        in h2 << (display pkgid ++ ": " ++ num allCounts "reverse dependencies" "reverse dependency"):versionBox:case counts of
+        (0, 0) ->
+          [ paragraph << [toHtml "No packages depend on ",
+                          packageAnchor, toHtml "."]
+          ]
+        (0, count) ->
+          paragraph << [toHtml "No packages depend on ",
+                          if hasVersion then noHtml else toHtml "some version of ",
+                          packageAnchor,
+                          toHtml $ pageText 0 ++ " However, ",
+                          altVersions count nonPageText otherLink,
+                          toHtml "."] : [otherCount, statLinks]
+        (count, count') ->
+          [ (paragraph<<) $ [ mainVersions count pageText packageAnchor, toHtml " (listed below)." ]
+            ++ if count' > 0 then [ toHtml " Additionally, "
+                                  , altVersions count' nonPageText otherLink
+                                  , toHtml $ ". That's " ++ show (count+count') ++ " in total." ]
+                             else []
+          ] ++ (if isRecent then [] else [paragraph << oldText]) ++ [otherCount, statLinks, reverseTable]
+      where
+        mainVersions count textFunc pkgLink = toHtml
+           [ toHtml $ num count "packages depend on " "package depends on "
+           , pkgLink
+           , toHtml $ textFunc count
+           ]
+        altVersions count textFunc altLink = toHtml
+           [ anchor ! [href altLink] << num count "packages" "package"
+           , toHtml  $ num' count " depend on " " depends on " ++ display pkgid ++ textFunc count
+           ]
+        recentText count    = ' ':num' count "in their latest versions" "in its latest version"
+        nonRecentText count = ' ':num' count "only in older or deprecated versions" "only in an older or deprecated version"
+        oldText = "The latest version of each package below, which doesn't depend on " ++ display pkgid ++ ", is linked from the first column. The version linked from the second column is the one which has a dependency on " ++ display pkgid ++", but it's no longer the preferred installation candidate. Note that packages which depend on versions of " ++ display pkgid ++ " not uploaded to Hackage are treated as not depending on it at all."
+
+        reverseTable = thediv << table << reverseTableRows
+        reverseTableRows =
+            tr ! [theclass "fancy"] << [ th << "Package name", th << "Version", th << "Reverse dependencies" ] :
+            [ tr ! [theclass (if odd n then "odd" else "even")] <<
+                [ td << anchor ! [href $ packageLink $ PackageIdentifier (packageName pkg) $ Version [] [] ] << display (packageName pkg)
+                , td << anchor ! (renderStatus status ++ [href $ packageLink pkg]) << display (packageVersion pkg)
+                , td << [ toHtml $ (show count) ++ " (", anchor ! [href $ reverseNameUri reverseResource "" $ packageName pkg] << "view", toHtml ")" ] ]
+            | (ReverseRender pkg status count, n) <- zip renders [(1::Int)..] ]
+
+        renderStatus (Just DeprecatedVersion) = [theclass "deprecated"]
+        renderStatus (Just UnpreferredVersion) = [theclass "unpreferred"]
+        renderStatus _ = []
+
+    reverseFlatRender :: PackageName -> (PackageName -> String) -> ReverseCount -> [(PackageName, Int)] -> [Html]
+    reverseFlatRender pkgname packageLink  (ReverseCount total flat _) pairs =
+      h2 << (display pkgname ++ ": " ++ num flat "total reverse dependencies" "reverse dependency"):case (total, flat) of
+        (0, 0) -> [paragraph << [toHtml "No packages depend on ", toPackage pkgname]]
+        _ ->
+          [ paragraph << if total == flat
+            then [toHtml "All packages which use ", toPackage pkgname, toHtml " depend on it ", anchor ! [href $ reverseNameUri reverseResource "" pkgname] << "directly", toHtml $ ". " ++ onlyPackage total]
+            else [toPackage pkgname, toHtml " has ", anchor ! [href $ reverseNameUri reverseResource "" pkgname] << num total "packages" "package", toHtml $ " which directly " ++ num' total "depend" "depends" ++ " on it, but there are more packages which depend on ", emphasize << "those", toHtml $ " packages. If you flatten the tree of reverse dependencies, you'll find " ++ show flat ++ " packages which use " ++ display pkgname ++ ", and " ++ show (flat-total) ++ " which do so without depending directly on it. All of these packages are listed below."]
+          , paragraph << [toHtml "See also the ", anchor ! [href $ reverseStatsUri reverseResource "" pkgname] << "statistics for specific versions", toHtml $ " of " ++ display pkgname ++ "."]
+          , reverseTable
+          ]
+      where
+        toPackage pkg = anchor ! [href $ packageLink pkg] << display pkg
+
+        onlyPackage count = if count == 1 then "There's only one:" else "There are " ++ show count ++ ":"
+
+        reverseTable = thediv << table << reverseTableRows
+        reverseTableRows =
+            (tr  ! [theclass "fancy"] << [ th << "Package name", th << "Total reverse dependencies" ]) :
+            [ tr ! [theclass (if odd n then "odd" else "even")] <<
+                [ td << toPackage pkg
+                , td << [ toHtml $ (show count) ++ " (", anchor ! [href $ reverseAllUri reverseResource "" pkg] << "view", toHtml ")" ]
+                ]
+            | ((pkg, count), n) <- zip pairs [(1::Int)..] ]
+
+    -- /package/:package/reverse/summary
+    reverseStatsRender :: PackageName -> [Version] -> (PackageId -> String) -> ReverseCount -> [Html]
+    reverseStatsRender pkgname allVersions packageLink (ReverseCount total flat versions) =
+        h2 << (display pkgname ++ ": reverse dependency statistics"):
+      [ case total of
+            0 -> paragraph << [ toHtml "No packages depend on ", thisPackage, toHtml "." ]
+            _ -> toHtml
+                [ paragraph << [ anchor ! [href $ reverseNameUri reverseResource "" pkgname] << num total "packages" "package"
+                               , toHtml $ num' total " depend" " depends"
+                               , toHtml " directly on ", thisPackage, toHtml "." ]
+                , paragraph << [ toHtml $ num (flat-total) "packages depend" "package depends" ++ " indirectly on " ++ display pkgname ++ "." ]
+                , paragraph << [ anchor ! [href $ reverseAllUri reverseResource "" pkgname] << num flat "packages" "package"
+                               , toHtml $ num' flat " depend" " depends" ++ " on " ++ display pkgname ++ " in total."
+                               ]
+                ]
+      , versionTable ]
+      where
+        toPackage pkgid = anchor ! [href $ packageLink pkgid] << display pkgid
+        thisPackage = toPackage (PackageIdentifier pkgname $ Version [] [])
+
+        versionTable = thediv << table << versionTableRows
+        versionTableRows =
+            (tr ! [theclass "fancy"] << [ th << "Version", th << "Reverse dependency count" ]) :
+            [ tr ! [theclass (if odd n then "odd" else "even")] <<
+                [ td << anchor ! [href $ packageLink pkgid ] << display version
+                , td << [ toHtml $ show (Map.findWithDefault 0 version versions) ++ " ("
+                        , anchor ! [href $ reverseUri reverseResource "" pkgid] << "view", toHtml ")" ]
+                ]
+            | (version, n) <- zip allVersions [(1::Int)..], let pkgid = PackageIdentifier pkgname version ]
+
+    num, num' :: Int -> String -> String -> String
+    num  n plural singular  = show n ++ " " ++ num' n plural singular
+    num' n plural singular = if n == 1 then singular else plural
+
+    -- /packages/reverse
+    reversePackagesRender :: (PackageName -> String) -> Int -> [(PackageName, Int, Int)] -> [Html]
+    reversePackagesRender packageLink pkgCount triples =
+            h2 << "Reverse dependencies" :
+          [ paragraph << [ "Hackage has " ++ show pkgCount ++ " packages. Here are all the packages that have package that depend on them:"]
+          , reverseTable ]
+      where
+        reverseTable = thediv << table << reverseTableRows
+        reverseTableRows =
+            (tr ! [theclass "fancy"] << [ th << "Package name", th << "Total", th << "Direct" ]) :
+            [ tr ! [theclass (if odd n then "odd" else "even")] <<
+                [ td << anchor ! [href $ packageLink pkgname ] << display pkgname
+                , td << [ toHtml $ show flat ++ " (", anchor ! [href $ reverseStatsUri reverseResource "" pkgname ] << "view", toHtml ")" ]
+                , td << [ toHtml $ show total ++ " (", anchor ! [href $ reverseNameUri reverseResource "" pkgname ] << "view", toHtml ")" ]
+                ] -- and, indirect is flat-total, if those are ever explicitly served
+            | ((pkgname, total, flat), n) <- zip triples [(1::Int)..], flat /= 0 ]
+
+    reversePackageSummary :: PackageId -> (Int, Int) -> (String, Html)
+    reversePackageSummary pkgid (direct, version) = (,) "Reverse dependencies" $
+      if direct == 0
+        then toHtml "None"
+        else toHtml [ anchor ! [href $ reverseUri reverseResource "" pkgid ] << show version
+                    , toHtml " for ", toHtml . display $ packageVersion pkgid
+                    , toHtml " and "
+                    , anchor ! [href $ reverseNameUri reverseResource "" (packageName pkgid) ] << show direct
+                    , toHtml " total"]
diff --git a/Distribution/Server/Pages/Template.hs b/Distribution/Server/Pages/Template.hs
index 5c3addad4..32e58c3c2 100644
--- a/Distribution/Server/Pages/Template.hs
+++ b/Distribution/Server/Pages/Template.hs
@@ -29,6 +29,8 @@ hackagePageWith headExtra docTitle docSubtitle docContent bodyExtra =
                 , thelink ! [ rel "stylesheet"
                             , href stylesheetURL
                             , thetype "text/css"] << noHtml
+                , meta ! [ name "viewport"
+                         , content "width=device-width, initial-scale=1"]
                 -- if Search is enabled
                 , thelink ! [ rel "search", href "/packages/opensearch.xml"
                             , thetype "application/opensearchdescription+xml"
@@ -58,7 +60,7 @@ stylesheetURL = "/static/hackage.css"
 
 -- URL of the package list
 pkgListURL :: URL
-pkgListURL = "/packages/"
+pkgListURL = "/packages/browse"
 
 -- URL of the upload form
 introductionURL :: URL
diff --git a/Distribution/Server/Users/Backup.hs b/Distribution/Server/Users/Backup.hs
index c842520cc..815555286 100644
--- a/Distribution/Server/Users/Backup.hs
+++ b/Distribution/Server/Users/Backup.hs
@@ -20,7 +20,6 @@ import Distribution.Server.Framework.BackupDump
 import Distribution.Server.Framework.BackupRestore
 import Distribution.Text (display)
 import Data.Version
-import Data.Monoid
 import Text.CSV (CSV, Record)
 import qualified Data.Map as M
 import qualified Data.Text as T
@@ -209,4 +208,3 @@ authTokensToCSV backuptype users =
     | backuptype == FullBackup
     , (uid, uinfo)   <- Users.enumerateAllUsers users
     , (token, descr) <- M.toList (userTokens uinfo) ]
-
diff --git a/datafiles/static/datatables/jquery.dataTables.min.css b/datafiles/static/datatables/jquery.dataTables.min.css
new file mode 100644
index 000000000..781de6bfc
--- /dev/null
+++ b/datafiles/static/datatables/jquery.dataTables.min.css
@@ -0,0 +1 @@
+table.dataTable{width:100%;margin:0 auto;clear:both;border-collapse:separate;border-spacing:0}table.dataTable thead th,table.dataTable tfoot th{font-weight:bold}table.dataTable thead th,table.dataTable thead td{padding:10px 18px;border-bottom:1px solid #111}table.dataTable thead th:active,table.dataTable thead td:active{outline:none}table.dataTable tfoot th,table.dataTable tfoot td{padding:10px 18px 6px 18px;border-top:1px solid #111}table.dataTable thead .sorting,table.dataTable thead .sorting_asc,table.dataTable thead .sorting_desc{cursor:pointer;*cursor:hand}table.dataTable thead .sorting,table.dataTable thead .sorting_asc,table.dataTable thead .sorting_desc,table.dataTable thead .sorting_asc_disabled,table.dataTable thead .sorting_desc_disabled{background-repeat:no-repeat;background-position:center right}table.dataTable thead .sorting{background-image:url("../images/sort_both.png")}table.dataTable thead .sorting_asc{background-image:url("../images/sort_asc.png")}table.dataTable thead .sorting_desc{background-image:url("../images/sort_desc.png")}table.dataTable thead .sorting_asc_disabled{background-image:url("../images/sort_asc_disabled.png")}table.dataTable thead .sorting_desc_disabled{background-image:url("../images/sort_desc_disabled.png")}table.dataTable tbody tr{background-color:#ffffff}table.dataTable tbody tr.selected{background-color:#B0BED9}table.dataTable tbody th,table.dataTable tbody td{padding:8px 10px}table.dataTable.row-border tbody th,table.dataTable.row-border tbody td,table.dataTable.display tbody th,table.dataTable.display tbody td{border-top:1px solid #ddd}table.dataTable.row-border tbody tr:first-child th,table.dataTable.row-border tbody tr:first-child td,table.dataTable.display tbody tr:first-child th,table.dataTable.display tbody tr:first-child td{border-top:none}table.dataTable.cell-border tbody th,table.dataTable.cell-border tbody td{border-top:1px solid #ddd;border-right:1px solid #ddd}table.dataTable.cell-border tbody tr 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+renderer:null,rowId:"DT_RowId"};X(m.defaults);m.defaults.column={aDataSort:null,iDataSort:-1,asSorting:["asc","desc"],bSearchable:!0,bSortable:!0,bVisible:!0,fnCreatedCell:null,mData:null,mRender:null,sCellType:"td",sClass:"",sContentPadding:"",sDefaultContent:null,sName:"",sSortDataType:"std",sTitle:null,sType:null,sWidth:null};X(m.defaults.column);m.models.oSettings={oFeatures:{bAutoWidth:null,bDeferRender:null,bFilter:null,bInfo:null,bLengthChange:null,bPaginate:null,bProcessing:null,bServerSide:null,
+bSort:null,bSortMulti:null,bSortClasses:null,bStateSave:null},oScroll:{bCollapse:null,iBarWidth:0,sX:null,sXInner:null,sY:null},oLanguage:{fnInfoCallback:null},oBrowser:{bScrollOversize:!1,bScrollbarLeft:!1,bBounding:!1,barWidth:0},ajax:null,aanFeatures:[],aoData:[],aiDisplay:[],aiDisplayMaster:[],aIds:{},aoColumns:[],aoHeader:[],aoFooter:[],oPreviousSearch:{},aoPreSearchCols:[],aaSorting:null,aaSortingFixed:[],asStripeClasses:null,asDestroyStripes:[],sDestroyWidth:0,aoRowCallback:[],aoHeaderCallback:[],
+aoFooterCallback:[],aoDrawCallback:[],aoRowCreatedCallback:[],aoPreDrawCallback:[],aoInitComplete:[],aoStateSaveParams:[],aoStateLoadParams:[],aoStateLoaded:[],sTableId:"",nTable:null,nTHead:null,nTFoot:null,nTBody:null,nTableWrapper:null,bDeferLoading:!1,bInitialised:!1,aoOpenRows:[],sDom:null,searchDelay:null,sPaginationType:"two_button",iStateDuration:0,aoStateSave:[],aoStateLoad:[],oSavedState:null,oLoadedState:null,sAjaxSource:null,sAjaxDataProp:null,bAjaxDataGet:!0,jqXHR:null,json:k,oAjaxData:k,
+fnServerData:null,aoServerParams:[],sServerMethod:null,fnFormatNumber:null,aLengthMenu:null,iDraw:0,bDrawing:!1,iDrawError:-1,_iDisplayLength:10,_iDisplayStart:0,_iRecordsTotal:0,_iRecordsDisplay:0,bJUI:null,oClasses:{},bFiltered:!1,bSorted:!1,bSortCellsTop:null,oInit:null,aoDestroyCallback:[],fnRecordsTotal:function(){return"ssp"==y(this)?1*this._iRecordsTotal:this.aiDisplayMaster.length},fnRecordsDisplay:function(){return"ssp"==y(this)?1*this._iRecordsDisplay:this.aiDisplay.length},fnDisplayEnd:function(){var a=
+this._iDisplayLength,b=this._iDisplayStart,c=b+a,d=this.aiDisplay.length,e=this.oFeatures,f=e.bPaginate;return e.bServerSide?!1===f||-1===a?b+d:Math.min(b+a,this._iRecordsDisplay):!f||c>d||-1===a?d:c},oInstance:null,sInstance:null,iTabIndex:0,nScrollHead:null,nScrollFoot:null,aLastSort:[],oPlugins:{},rowIdFn:null,rowId:null};m.ext=v={buttons:{},classes:{},builder:"-source-",errMode:"alert",feature:[],search:[],selector:{cell:[],column:[],row:[]},internal:{},legacy:{ajax:null},pager:{},renderer:{pageButton:{},
+header:{}},order:{},type:{detect:[],search:{},order:{}},_unique:0,fnVersionCheck:m.fnVersionCheck,iApiIndex:0,oJUIClasses:{},sVersion:m.version};h.extend(v,{afnFiltering:v.search,aTypes:v.type.detect,ofnSearch:v.type.search,oSort:v.type.order,afnSortData:v.order,aoFeatures:v.feature,oApi:v.internal,oStdClasses:v.classes,oPagination:v.pager});h.extend(m.ext.classes,{sTable:"dataTable",sNoFooter:"no-footer",sPageButton:"paginate_button",sPageButtonActive:"current",sPageButtonDisabled:"disabled",sStripeOdd:"odd",
+sStripeEven:"even",sRowEmpty:"dataTables_empty",sWrapper:"dataTables_wrapper",sFilter:"dataTables_filter",sInfo:"dataTables_info",sPaging:"dataTables_paginate paging_",sLength:"dataTables_length",sProcessing:"dataTables_processing",sSortAsc:"sorting_asc",sSortDesc:"sorting_desc",sSortable:"sorting",sSortableAsc:"sorting_asc_disabled",sSortableDesc:"sorting_desc_disabled",sSortableNone:"sorting_disabled",sSortColumn:"sorting_",sFilterInput:"",sLengthSelect:"",sScrollWrapper:"dataTables_scroll",sScrollHead:"dataTables_scrollHead",
+sScrollHeadInner:"dataTables_scrollHeadInner",sScrollBody:"dataTables_scrollBody",sScrollFoot:"dataTables_scrollFoot",sScrollFootInner:"dataTables_scrollFootInner",sHeaderTH:"",sFooterTH:"",sSortJUIAsc:"",sSortJUIDesc:"",sSortJUI:"",sSortJUIAscAllowed:"",sSortJUIDescAllowed:"",sSortJUIWrapper:"",sSortIcon:"",sJUIHeader:"",sJUIFooter:""});var Ca="",Ca="",H=Ca+"ui-state-default",ia=Ca+"css_right ui-icon ui-icon-",Xb=Ca+"fg-toolbar ui-toolbar ui-widget-header ui-helper-clearfix";h.extend(m.ext.oJUIClasses,
+m.ext.classes,{sPageButton:"fg-button ui-button "+H,sPageButtonActive:"ui-state-disabled",sPageButtonDisabled:"ui-state-disabled",sPaging:"dataTables_paginate fg-buttonset ui-buttonset fg-buttonset-multi ui-buttonset-multi paging_",sSortAsc:H+" sorting_asc",sSortDesc:H+" sorting_desc",sSortable:H+" sorting",sSortableAsc:H+" sorting_asc_disabled",sSortableDesc:H+" sorting_desc_disabled",sSortableNone:H+" sorting_disabled",sSortJUIAsc:ia+"triangle-1-n",sSortJUIDesc:ia+"triangle-1-s",sSortJUI:ia+"carat-2-n-s",
+sSortJUIAscAllowed:ia+"carat-1-n",sSortJUIDescAllowed:ia+"carat-1-s",sSortJUIWrapper:"DataTables_sort_wrapper",sSortIcon:"DataTables_sort_icon",sScrollHead:"dataTables_scrollHead "+H,sScrollFoot:"dataTables_scrollFoot "+H,sHeaderTH:H,sFooterTH:H,sJUIHeader:Xb+" ui-corner-tl ui-corner-tr",sJUIFooter:Xb+" ui-corner-bl ui-corner-br"});var Mb=m.ext.pager;h.extend(Mb,{simple:function(){return["previous","next"]},full:function(){return["first","previous","next","last"]},numbers:function(a,b){return[ya(a,
+b)]},simple_numbers:function(a,b){return["previous",ya(a,b),"next"]},full_numbers:function(a,b){return["first","previous",ya(a,b),"next","last"]},_numbers:ya,numbers_length:7});h.extend(!0,m.ext.renderer,{pageButton:{_:function(a,b,c,d,e,f){var g=a.oClasses,j=a.oLanguage.oPaginate,i=a.oLanguage.oAria.paginate||{},k,l,m=0,p=function(b,d){var o,r,u,s,v=function(b){Ta(a,b.data.action,true)};o=0;for(r=d.length;o<r;o++){s=d[o];if(h.isArray(s)){u=h("<"+(s.DT_el||"div")+"/>").appendTo(b);p(u,s)}else{k=null;
+l="";switch(s){case "ellipsis":b.append('<span class="ellipsis">&#x2026;</span>');break;case "first":k=j.sFirst;l=s+(e>0?"":" "+g.sPageButtonDisabled);break;case "previous":k=j.sPrevious;l=s+(e>0?"":" "+g.sPageButtonDisabled);break;case "next":k=j.sNext;l=s+(e<f-1?"":" "+g.sPageButtonDisabled);break;case "last":k=j.sLast;l=s+(e<f-1?"":" "+g.sPageButtonDisabled);break;default:k=s+1;l=e===s?g.sPageButtonActive:""}if(k!==null){u=h("<a>",{"class":g.sPageButton+" "+l,"aria-controls":a.sTableId,"aria-label":i[s],
+"data-dt-idx":m,tabindex:a.iTabIndex,id:c===0&&typeof s==="string"?a.sTableId+"_"+s:null}).html(k).appendTo(b);Wa(u,{action:s},v);m++}}}},r;try{r=h(b).find(I.activeElement).data("dt-idx")}catch(o){}p(h(b).empty(),d);r&&h(b).find("[data-dt-idx="+r+"]").focus()}}});h.extend(m.ext.type.detect,[function(a,b){var c=b.oLanguage.sDecimal;return Za(a,c)?"num"+c:null},function(a){if(a&&!(a instanceof Date)&&(!ac.test(a)||!bc.test(a)))return null;var b=Date.parse(a);return null!==b&&!isNaN(b)||M(a)?"date":
+null},function(a,b){var c=b.oLanguage.sDecimal;return Za(a,c,!0)?"num-fmt"+c:null},function(a,b){var c=b.oLanguage.sDecimal;return Rb(a,c)?"html-num"+c:null},function(a,b){var c=b.oLanguage.sDecimal;return Rb(a,c,!0)?"html-num-fmt"+c:null},function(a){return M(a)||"string"===typeof a&&-1!==a.indexOf("<")?"html":null}]);h.extend(m.ext.type.search,{html:function(a){return M(a)?a:"string"===typeof a?a.replace(Ob," ").replace(Aa,""):""},string:function(a){return M(a)?a:"string"===typeof a?a.replace(Ob,
+" "):a}});var za=function(a,b,c,d){if(0!==a&&(!a||"-"===a))return-Infinity;b&&(a=Qb(a,b));a.replace&&(c&&(a=a.replace(c,"")),d&&(a=a.replace(d,"")));return 1*a};h.extend(v.type.order,{"date-pre":function(a){return Date.parse(a)||0},"html-pre":function(a){return M(a)?"":a.replace?a.replace(/<.*?>/g,"").toLowerCase():a+""},"string-pre":function(a){return M(a)?"":"string"===typeof a?a.toLowerCase():!a.toString?"":a.toString()},"string-asc":function(a,b){return a<b?-1:a>b?1:0},"string-desc":function(a,
+b){return a<b?1:a>b?-1:0}});db("");h.extend(!0,m.ext.renderer,{header:{_:function(a,b,c,d){h(a.nTable).on("order.dt.DT",function(e,f,g,h){if(a===f){e=c.idx;b.removeClass(c.sSortingClass+" "+d.sSortAsc+" "+d.sSortDesc).addClass(h[e]=="asc"?d.sSortAsc:h[e]=="desc"?d.sSortDesc:c.sSortingClass)}})},jqueryui:function(a,b,c,d){h("<div/>").addClass(d.sSortJUIWrapper).append(b.contents()).append(h("<span/>").addClass(d.sSortIcon+" "+c.sSortingClassJUI)).appendTo(b);h(a.nTable).on("order.dt.DT",function(e,
+f,g,h){if(a===f){e=c.idx;b.removeClass(d.sSortAsc+" "+d.sSortDesc).addClass(h[e]=="asc"?d.sSortAsc:h[e]=="desc"?d.sSortDesc:c.sSortingClass);b.find("span."+d.sSortIcon).removeClass(d.sSortJUIAsc+" "+d.sSortJUIDesc+" "+d.sSortJUI+" "+d.sSortJUIAscAllowed+" "+d.sSortJUIDescAllowed).addClass(h[e]=="asc"?d.sSortJUIAsc:h[e]=="desc"?d.sSortJUIDesc:c.sSortingClassJUI)}})}}});var Yb=function(a){return"string"===typeof a?a.replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/"/g,"&quot;"):a};m.render={number:function(a,
+b,c,d,e){return{display:function(f){if("number"!==typeof f&&"string"!==typeof f)return f;var g=0>f?"-":"",h=parseFloat(f);if(isNaN(h))return Yb(f);f=Math.abs(h);h=parseInt(f,10);f=c?b+(f-h).toFixed(c).substring(2):"";return g+(d||"")+h.toString().replace(/\B(?=(\d{3})+(?!\d))/g,a)+f+(e||"")}}},text:function(){return{display:Yb}}};h.extend(m.ext.internal,{_fnExternApiFunc:Nb,_fnBuildAjax:ra,_fnAjaxUpdate:lb,_fnAjaxParameters:ub,_fnAjaxUpdateDraw:vb,_fnAjaxDataSrc:sa,_fnAddColumn:Ea,_fnColumnOptions:ja,
+_fnAdjustColumnSizing:Y,_fnVisibleToColumnIndex:Z,_fnColumnIndexToVisible:$,_fnVisbleColumns:aa,_fnGetColumns:la,_fnColumnTypes:Ga,_fnApplyColumnDefs:ib,_fnHungarianMap:X,_fnCamelToHungarian:K,_fnLanguageCompat:Da,_fnBrowserDetect:gb,_fnAddData:N,_fnAddTr:ma,_fnNodeToDataIndex:function(a,b){return b._DT_RowIndex!==k?b._DT_RowIndex:null},_fnNodeToColumnIndex:function(a,b,c){return h.inArray(c,a.aoData[b].anCells)},_fnGetCellData:B,_fnSetCellData:jb,_fnSplitObjNotation:Ja,_fnGetObjectDataFn:Q,_fnSetObjectDataFn:R,
+_fnGetDataMaster:Ka,_fnClearTable:na,_fnDeleteIndex:oa,_fnInvalidate:ca,_fnGetRowElements:Ia,_fnCreateTr:Ha,_fnBuildHead:kb,_fnDrawHead:ea,_fnDraw:O,_fnReDraw:T,_fnAddOptionsHtml:nb,_fnDetectHeader:da,_fnGetUniqueThs:qa,_fnFeatureHtmlFilter:pb,_fnFilterComplete:fa,_fnFilterCustom:yb,_fnFilterColumn:xb,_fnFilter:wb,_fnFilterCreateSearch:Pa,_fnEscapeRegex:Qa,_fnFilterData:zb,_fnFeatureHtmlInfo:sb,_fnUpdateInfo:Cb,_fnInfoMacros:Db,_fnInitialise:ga,_fnInitComplete:ta,_fnLengthChange:Ra,_fnFeatureHtmlLength:ob,
+_fnFeatureHtmlPaginate:tb,_fnPageChange:Ta,_fnFeatureHtmlProcessing:qb,_fnProcessingDisplay:C,_fnFeatureHtmlTable:rb,_fnScrollDraw:ka,_fnApplyToChildren:J,_fnCalculateColumnWidths:Fa,_fnThrottle:Oa,_fnConvertToWidth:Fb,_fnGetWidestNode:Gb,_fnGetMaxLenString:Hb,_fnStringToCss:x,_fnSortFlatten:V,_fnSort:mb,_fnSortAria:Jb,_fnSortListener:Va,_fnSortAttachListener:Ma,_fnSortingClasses:va,_fnSortData:Ib,_fnSaveState:wa,_fnLoadState:Kb,_fnSettingsFromNode:xa,_fnLog:L,_fnMap:E,_fnBindAction:Wa,_fnCallbackReg:z,
+_fnCallbackFire:u,_fnLengthOverflow:Sa,_fnRenderer:Na,_fnDataSource:y,_fnRowAttributes:La,_fnCalculateEnd:function(){}});h.fn.dataTable=m;m.$=h;h.fn.dataTableSettings=m.settings;h.fn.dataTableExt=m.ext;h.fn.DataTable=function(a){return h(this).dataTable(a).api()};h.each(m,function(a,b){h.fn.DataTable[a]=b});return h.fn.dataTable});
diff --git a/datafiles/static/graph/graph.css b/datafiles/static/graph/graph.css
new file mode 100644
index 000000000..4ad5cafc2
--- /dev/null
+++ b/datafiles/static/graph/graph.css
@@ -0,0 +1 @@
+ *//*! normalize.css v3.0.3 | MIT License | github.com/necolas/normalize.css */.label,sub,sup{vertical-align:baseline}.search ul,hr{box-sizing:content-box}hr,img{border:0}body,figure{margin:0}.btn-group>.btn-group,.btn-toolbar .btn,.btn-toolbar .btn-group,.btn-toolbar .input-group,.col-xs-1,.col-xs-10,.col-xs-11,.col-xs-12,.col-xs-2,.col-xs-3,.col-xs-4,.col-xs-5,.col-xs-6,.col-xs-7,.col-xs-8,.col-xs-9,.dropdown-menu{float:left}.navbar-fixed-bottom .navbar-collapse,.navbar-fixed-top .navbar-collapse,.pre-scrollable{max-height:340px}.form-control-feedback,.navigation-help,.node-hover-list,.node-hover-tooltip,.steering,a.btn.disabled,fieldset[disabled] a.btn{pointer-events:none}html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}article,aside,details,figcaption,figure,footer,header,hgroup,main,menu,nav,section,summary{display:block}audio,canvas,progress,video{display:inline-block;vertical-align:baseline}audio:not([controls]){display:none;height:0}[hidden],template{display:none}a{background-color:transparent}a:active,a:hover{outline:0}b,optgroup,strong{font-weight:700}dfn{font-style:italic}h1{margin:.67em 0}mark{background:#ff0;color:#000}sub,sup{font-size:75%;line-height:0;position:relative}sup{top:-.5em}sub{bottom:-.25em}img{vertical-align:middle}svg:not(:root){overflow:hidden}hr{height:0}pre,textarea{overflow:auto}code,kbd,pre,samp{font-size:1em}button,input,optgroup,select,textarea{color:inherit;font:inherit;margin:0}.glyphicon,address{font-style:normal}button{overflow:visible}button,select{text-transform:none}button,html input[type=button],input[type=reset],input[type=submit]{-webkit-appearance:button;cursor:pointer}button[disabled],html input[disabled]{cursor:default}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}input[type=checkbox],input[type=radio]{box-sizing:border-box;padding:0}input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{height:auto}input[type=search]::-webkit-search-cancel-button,input[type=search]::-webkit-search-decoration{-webkit-appearance:none}table{border-collapse:collapse;border-spacing:0}td,th{padding:0}/*! 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diff --git a/datafiles/static/graph/tmpl.js b/datafiles/static/graph/tmpl.js
new file mode 100644
index 000000000..88968fd95
--- /dev/null
+++ b/datafiles/static/graph/tmpl.js
@@ -0,0 +1,86 @@
+/*
+ * JavaScript Templates
+ * https://github.com/blueimp/JavaScript-Templates
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * http://www.opensource.org/licenses/MIT
+ *
+ * Inspired by John Resig's JavaScript Micro-Templating:
+ * http://ejohn.org/blog/javascript-micro-templating/
+ */
+
+/*global document, define, module */
+
+;(function ($) {
+  'use strict'
+  var tmpl = function (str, data) {
+    var f = !/[^\w\-\.:]/.test(str)
+      ? tmpl.cache[str] = tmpl.cache[str] || tmpl(tmpl.load(str))
+      : new Function(// eslint-disable-line no-new-func
+        tmpl.arg + ',tmpl',
+        'var _e=tmpl.encode' + tmpl.helper + ",_s='" +
+          str.replace(tmpl.regexp, tmpl.func) + "';return _s;"
+      )
+    return data ? f(data, tmpl) : function (data) {
+      return f(data, tmpl)
+    }
+  }
+  tmpl.cache = {}
+  tmpl.load = function (id) {
+    return document.getElementById(id).innerHTML
+  }
+  tmpl.regexp = /([\s'\\])(?!(?:[^{]|\{(?!%))*%\})|(?:\{%(=|#)([\s\S]+?)%\})|(\{%)|(%\})/g
+  tmpl.func = function (s, p1, p2, p3, p4, p5) {
+    if (p1) { // whitespace, quote and backspace in HTML context
+      return {
+        '\n': '\\n',
+        '\r': '\\r',
+        '\t': '\\t',
+        ' ': ' '
+      }[p1] || '\\' + p1
+    }
+    if (p2) { // interpolation: {%=prop%}, or unescaped: {%#prop%}
+      if (p2 === '=') {
+        return "'+_e(" + p3 + ")+'"
+      }
+      return "'+(" + p3 + "==null?'':" + p3 + ")+'"
+    }
+    if (p4) { // evaluation start tag: {%
+      return "';"
+    }
+    if (p5) { // evaluation end tag: %}
+      return "_s+='"
+    }
+  }
+  tmpl.encReg = /[<>&"'\x00]/g
+  tmpl.encMap = {
+    '<': '&lt;',
+    '>': '&gt;',
+    '&': '&amp;',
+    '"': '&quot;',
+    "'": '&#39;'
+  }
+  tmpl.encode = function (s) {
+    return (s == null ? '' : '' + s).replace(
+      tmpl.encReg,
+      function (c) {
+        return tmpl.encMap[c] || ''
+      }
+    )
+  }
+  tmpl.arg = 'o'
+  tmpl.helper = ",print=function(s,e){_s+=e?(s==null?'':s):_e(s);}" +
+                  ',include=function(s,d){_s+=tmpl(s,d);}'
+  if (typeof define === 'function' && define.amd) {
+    define(function () {
+      return tmpl
+    })
+  } else if (typeof module === 'object' && module.exports) {
+    module.exports = tmpl
+  } else {
+    $.tmpl = tmpl
+  }
+}(this))
diff --git a/datafiles/static/graph/vivagraph.js b/datafiles/static/graph/vivagraph.js
new file mode 100644
index 000000000..673125611
--- /dev/null
+++ b/datafiles/static/graph/vivagraph.js
@@ -0,0 +1,114 @@
+!function(S){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=S();else if("function"==typeof define&&define.amd)define([],S);else{var e;"undefined"!=typeof window?e=window:"undefined"!=typeof global?e=global:"undefined"!=typeof self&&(e=self);e.Viva=S()}}(function(){return function e(g,l,d){function m(a,c){if(!l[a]){if(!g[a]){var f="function"==typeof require&&require;if(!c&&f)return f(a,!0);if(b)return b(a,!0);f=Error("Cannot find module '"+a+"'");throw f.code="MODULE_NOT_FOUND",
+f;}f=l[a]={exports:{}};g[a][0].call(f.exports,function(f){var c=g[a][1][f];return m(c?c:f)},f,f.exports,e,g,l,d)}return l[a].exports}for(var b="function"==typeof require&&require,c=0;c<d.length;c++)m(d[c]);return m}({1:[function(e,g,l){var d=e("ngraph.random");l={lazyExtend:function(){return e("ngraph.merge").apply(this,arguments)},randomIterator:function(){return d.randomIterator.apply(d,arguments)},random:function(){return d.random.apply(d,arguments)},events:e("ngraph.events")};l.Graph={version:e("./version.js"),
+graph:e("ngraph.graph"),serializer:function(){return{loadFromJSON:e("ngraph.fromjson"),storeToJSON:e("ngraph.tojson")}},centrality:e("./Algorithms/centrality.js"),operations:e("./Algorithms/operations.js"),geom:function(){return{intersect:e("gintersect"),intersectRect:e("./Utils/intersectRect.js")}},webgl:e("./WebGL/webgl.js"),webglInputEvents:e("./WebGL/webglInputEvents.js"),generator:function(){return e("ngraph.generators")},Input:{domInputManager:e("./Input/domInputManager.js"),webglInputManager:e("./Input/webglInputManager.js")},
+Utils:{dragndrop:e("./Input/dragndrop.js"),findElementPosition:e("./Utils/findElementPosition.js"),timer:e("./Utils/timer.js"),getDimension:e("./Utils/getDimensions.js"),events:e("./Utils/backwardCompatibleEvents.js")},Layout:{forceDirected:e("ngraph.forcelayout"),constant:e("./Layout/constant.js")},View:{Texture:e("./WebGL/texture.js"),webglAtlas:e("./WebGL/webglAtlas.js"),webglImageNodeProgram:e("./WebGL/webglImageNodeProgram.js"),webglLinkProgram:e("./WebGL/webglLinkProgram.js"),webglNodeProgram:e("./WebGL/webglNodeProgram.js"),
+webglLine:e("./WebGL/webglLine.js"),webglSquare:e("./WebGL/webglSquare.js"),webglImage:e("./WebGL/webglImage.js"),webglGraphics:e("./View/webglGraphics.js"),_webglUtil:{parseColor:e("./WebGL/parseColor.js")},svgGraphics:e("./View/svgGraphics.js"),renderer:e("./View/renderer.js"),cssGraphics:function(){throw Error("cssGraphics is deprecated. Please use older version of vivagraph (< 0.7) if you need it");},svgNodeFactory:function(){throw Error("svgNodeFactory is deprecated. Please use older version of vivagraph (< 0.7) if you need it");
+},community:function(){throw Error("community is deprecated. Please use vivagraph < 0.7 if you need it, or `https://github.com/anvaka/ngraph.slpa` module");}},Rect:e("./Utils/rect.js"),svg:e("simplesvg"),BrowserInfo:e("./Utils/browserInfo.js")};g.exports=l},{"./Algorithms/centrality.js":32,"./Algorithms/operations.js":33,"./Input/domInputManager.js":34,"./Input/dragndrop.js":35,"./Input/webglInputManager.js":36,"./Layout/constant.js":37,"./Utils/backwardCompatibleEvents.js":38,"./Utils/browserInfo.js":39,
+"./Utils/findElementPosition.js":41,"./Utils/getDimensions.js":42,"./Utils/intersectRect.js":43,"./Utils/rect.js":45,"./Utils/timer.js":46,"./View/renderer.js":48,"./View/svgGraphics.js":49,"./View/webglGraphics.js":50,"./WebGL/parseColor.js":51,"./WebGL/texture.js":52,"./WebGL/webgl.js":53,"./WebGL/webglAtlas.js":54,"./WebGL/webglImage.js":55,"./WebGL/webglImageNodeProgram.js":56,"./WebGL/webglInputEvents.js":57,"./WebGL/webglLine.js":58,"./WebGL/webglLinkProgram.js":59,"./WebGL/webglNodeProgram.js":60,
+"./WebGL/webglSquare.js":61,"./version.js":62,gintersect:2,"ngraph.events":6,"ngraph.forcelayout":7,"ngraph.fromjson":21,"ngraph.generators":22,"ngraph.graph":23,"ngraph.merge":24,"ngraph.random":25,"ngraph.tojson":26,simplesvg:27}],2:[function(e,g,l){g.exports=function(d,m,b,c,a,p,f,h){var n,k,e,g,r,x={x:0,y:0};n=c-m;e=d-b;r=b*m-d*c;k=n*a+e*p+r;g=n*f+e*h+r;if(0!==k&&0!==g&&0<=k===4<=g)return null;k=h-p;g=a-f;a=f*p-a*h;d=k*d+g*m+a;b=k*b+g*c+a;if(0!==d&&0!==b&&0<=d===0<=b)return null;b=n*g-k*e;if(0===
+b)return null;e=e*a-g*r;x.x=(0>e?e-0:e+0)/b;e=k*r-n*a;x.y=(0>e?e-0:e+0)/b;return x}},{}],3:[function(e,g,l){g.exports.degree=e("./src/degree.js");g.exports.betweenness=e("./src/betweenness.js")},{"./src/betweenness.js":4,"./src/degree.js":5}],4:[function(e,g,l){g.exports=function(d,m){function b(a){r[a]/=2}function c(a){e[a.id]=0}function a(a){function c(a){a=a.id;-1===n[a]&&(n[a]=n[b]+1,p.push(a));n[a]===n[b]+1&&(k[a]+=k[b],h[a].push(b))}d.forEachNode(function(a){a=a.id;h[a]=[];n[a]=-1;k[a]=0});
+n[a]=0;k[a]=1;for(p.push(a);p.length;){var b=p.shift();Object.create(null);f.push(b);d.forEachLinkedNode(b,c,m)}}var p=[],f=[],h=Object.create(null),n=Object.create(null),k=Object.create(null),e=Object.create(null),g,r=Object.create(null);d.forEachNode(function(a){r[a.id]=0});d.forEachNode(function(b){g=b.id;a(g);for(d.forEachNode(c);f.length;){b=f.pop();for(var p=(1+e[b])/k[b],t=h[b],n=0;n<t.length;++n){var m=t[n];e[m]+=k[m]*p}b!==g&&(r[b]+=e[b])}});m||Object.keys(r).forEach(b);return r}},{}],5:[function(e,
+g,l){function d(b,a){for(var p=0,f=0;f<b.length;f+=1)p+=b[f].toId===a?1:0;return p}function m(b,a){for(var p=0,f=0;f<b.length;f+=1)p+=b[f].fromId===a?1:0;return p}function b(b){return b.length}g.exports=function(c,a){var p,f=Object.create(null);a=(a||"both").toLowerCase();if("both"===a||"inout"===a)p=b;else if("in"===a)p=d;else if("out"===a)p=m;else throw Error("Expected centrality degree kind is: in, out or both");c.forEachNode(function(a){var b=c.getLinks(a.id);f[a.id]=p(b,a.id)});return f}},{}],
+6:[function(e,g,l){function d(d){var b=Object.create(null);return{on:function(c,a,p){if("function"!==typeof a)throw Error("callback is expected to be a function");var f=b[c];f||(f=b[c]=[]);f.push({callback:a,ctx:p});return d},off:function(c,a){if("undefined"===typeof c)return b=Object.create(null),d;if(b[c])if("function"!==typeof a)delete b[c];else for(var p=b[c],f=0;f<p.length;++f)p[f].callback===a&&p.splice(f,1);return d},fire:function(c){var a=b[c];if(!a)return d;var p;1<arguments.length&&(p=Array.prototype.splice.call(arguments,
+1));for(var f=0;f<a.length;++f){var h=a[f];h.callback.apply(h.ctx,p)}return d}}}g.exports=function(m){if(!m)throw Error("Eventify cannot use falsy object as events subject");for(var b=["on","fire","off"],c=0;c<b.length;++c)if(m.hasOwnProperty(b[c]))throw Error("Subject cannot be eventified, since it already has property '"+b[c]+"'");b=d(m);m.on=b.on;m.off=b.off;m.fire=b.fire;return m}},{}],7:[function(e,g,l){function d(){}g.exports=function(m,b){function c(b){for(var c=0;c<b.length;++c){var h=b[c];
+if("add"===h.changeType)h.node&&a(h.node.id),h.link&&p(h.link);else if("remove"===h.changeType){if(h.node){var d=h.node.id,e=k[d];e&&(k[d]=null,delete k[d],n.removeBody(e))}if(h.link&&(h=h.link,d=g[h.id])){var e=m.getNode(h.fromId),A=m.getNode(h.toId);e&&f(e.id);A&&f(A.id);delete g[h.id];n.removeSpring(d)}}}}function a(a){var b=k[a];if(!b){var c=m.getNode(a);if(!c)throw Error("initBody() was called with unknown node id");b=c.position;if(!b){b=[];if(c.links)for(var h=Math.min(c.links.length,2),p=0;p<
+h;++p){var d=c.links[p];(d=d.fromId!==c.id?k[d.fromId]:k[d.toId])&&d.pos&&b.push(d)}b=n.getBestNewBodyPosition(b)}b=n.addBodyAt(b);k[a]=b;f(a);c&&(c.isPinned||c.data&&c.data.isPinned)&&(b.isPinned=!0)}}function p(a){f(a.fromId);f(a.toId);var b=n.addSpring(k[a.fromId],k[a.toId],a.length);q(a,b);g[a.id]=b}function f(a){k[a].mass=1+m.getLinks(a).length/3}function h(b){var c=k[b];c||(a(b),c=k[b]);return c}if(!m)throw Error("Graph structure cannot be undefined");var n=e("ngraph.physics.simulator")(b),
+k="function"===typeof Object.create?Object.create(null):{},g={},q=n.settings.springTransform||d;(function(){m.forEachNode(function(b){a(b.id)});m.forEachLink(p)})();m.on("changed",c);return{step:function(){return n.step()},getNodePosition:function(a){return h(a).pos},setNodePosition:function(a){var b=h(a);b.setPosition.apply(b,Array.prototype.slice.call(arguments,1))},getLinkPosition:function(a){if(a=g[a])return{from:a.from.pos,to:a.to.pos}},getGraphRect:function(){return n.getBBox()},pinNode:function(a,
+b){h(a.id).isPinned=!!b},isNodePinned:function(a){return h(a.id).isPinned},dispose:function(){m.off("changed",c)},getBody:function(a){return k[a]},getSpring:function(a,b){var c;if(void 0===b)c="string"===typeof a?a:a.id;else{c=m.hasLink(a,b);if(!c)return;c=c.id}return g[c]},simulator:n}};g.exports.simulator=e("ngraph.physics.simulator")},{"ngraph.physics.simulator":8}],8:[function(e,g,l){g.exports=function(d){var m=e("./lib/spring"),b=e("ngraph.expose");d=e("ngraph.merge")(d,{springLength:30,springCoeff:8E-4,
+gravity:-1.2,theta:.8,dragCoeff:.02,timeStep:20,stableThreshold:.009});var c=d.createQuadTree||e("ngraph.quadtreebh"),a=d.createBounds||e("./lib/bounds"),p=d.createDragForce||e("./lib/dragForce"),f=d.createSpringForce||e("./lib/springForce"),h=d.integrator||e("./lib/eulerIntegrator"),n=d.createBody||e("./lib/createBody"),k=[],g=[],q=c(d),r=a(k,d),x=f(d),y=p(d),c={bodies:k,springs:g,settings:d,step:function(){var a,b=k.length;if(b)for(q.insertBodies(k);b--;)a=k[b],a.isPinned||(a.force.reset(),q.updateBodyForce(a),
+y.update(a));for(b=g.length;b--;)x.update(g[b]);a=h(k,d.timeStep);r.update();return a<d.stableThreshold},addBody:function(a){if(!a)throw Error("Body is required");k.push(a);return a},addBodyAt:function(a){if(!a)throw Error("Body position is required");a=n(a);k.push(a);return a},removeBody:function(a){if(a&&(a=k.indexOf(a),!(0>a)))return k.splice(a,1),0===k.length&&r.reset(),!0},addSpring:function(a,b,c,f,h){if(!a||!b)throw Error("Cannot add null spring to force simulator");"number"!==typeof c&&(c=
+-1);a=new m(a,b,c,0<=h?h:-1,f);g.push(a);return a},removeSpring:function(a){if(a&&(a=g.indexOf(a),-1<a))return g.splice(a,1),!0},getBestNewBodyPosition:function(a){return r.getBestNewPosition(a)},getBBox:function(){return r.box},gravity:function(a){return void 0!==a?(d.gravity=a,q.options({gravity:a}),this):d.gravity},theta:function(a){return void 0!==a?(d.theta=a,q.options({theta:a}),this):d.theta}};b(d,c);return c}},{"./lib/bounds":9,"./lib/createBody":10,"./lib/dragForce":11,"./lib/eulerIntegrator":12,
+"./lib/spring":13,"./lib/springForce":14,"ngraph.expose":15,"ngraph.merge":24,"ngraph.quadtreebh":17}],9:[function(e,g,l){g.exports=function(d,m){var b=e("ngraph.random").random(42),c={x1:0,y1:0,x2:0,y2:0};return{box:c,update:function(){var a=d.length;if(0!==a){for(var b=Number.MAX_VALUE,f=Number.MAX_VALUE,h=Number.MIN_VALUE,n=Number.MIN_VALUE;a--;){var k=d[a];k.isPinned?(k.pos.x=k.prevPos.x,k.pos.y=k.prevPos.y):(k.prevPos.x=k.pos.x,k.prevPos.y=k.pos.y);k.pos.x<b&&(b=k.pos.x);k.pos.x>h&&(h=k.pos.x);
+k.pos.y<f&&(f=k.pos.y);k.pos.y>n&&(n=k.pos.y)}c.x1=b;c.x2=h;c.y1=f;c.y2=n}},reset:function(){c.x1=c.y1=0;c.x2=c.y2=0},getBestNewPosition:function(a){var p=0,f=0;if(a.length){for(var h=0;h<a.length;++h)p+=a[h].pos.x,f+=a[h].pos.y;p/=a.length;f/=a.length}else p=(c.x1+c.x2)/2,f=(c.y1+c.y2)/2;a=m.springLength;return{x:p+b.next(a)-a/2,y:f+b.next(a)-a/2}}}}},{"ngraph.random":25}],10:[function(e,g,l){var d=e("ngraph.physics.primitives");g.exports=function(m){return new d.Body(m)}},{"ngraph.physics.primitives":16}],
+11:[function(e,g,l){g.exports=function(d){var m=e("ngraph.merge"),b=e("ngraph.expose");d=m(d,{dragCoeff:.02});m={update:function(b){b.force.x-=d.dragCoeff*b.velocity.x;b.force.y-=d.dragCoeff*b.velocity.y}};b(d,m,["dragCoeff"]);return m}},{"ngraph.expose":15,"ngraph.merge":24}],12:[function(e,g,l){g.exports=function(d,m){var b,c=0,a,p=0,f,h=d.length;for(f=0;f<h;++f){var n=d[f];b=m/n.mass;n.velocity.x+=b*n.force.x;n.velocity.y+=b*n.force.y;b=n.velocity.x;a=n.velocity.y;var k=Math.sqrt(b*b+a*a);1<k&&
+(n.velocity.x=b/k,n.velocity.y=a/k);b=m*n.velocity.x;a=m*n.velocity.y;n.pos.x+=b;n.pos.y+=a;c+=Math.abs(b);p+=Math.abs(a)}return(c*c+p*p)/d.length}},{}],13:[function(e,g,l){g.exports=function(d,m,b,c,a){this.from=d;this.to=m;this.length=b;this.coeff=c;this.weight="number"===typeof a?a:1}},{}],14:[function(e,g,l){g.exports=function(d){var m=e("ngraph.merge"),b=e("ngraph.random").random(42),c=e("ngraph.expose");d=m(d,{springCoeff:2E-4,springLength:80});m={update:function(a){var c=a.from,f=a.to,h=0>
+a.length?d.springLength:a.length,n=f.pos.x-c.pos.x,k=f.pos.y-c.pos.y,m=Math.sqrt(n*n+k*k);0===m&&(n=(b.nextDouble()-.5)/50,k=(b.nextDouble()-.5)/50,m=Math.sqrt(n*n+k*k));a=(!a.coeff||0>a.coeff?d.springCoeff:a.coeff)*(m-h)/m*a.weight;c.force.x+=a*n;c.force.y+=a*k;f.force.x-=a*n;f.force.y-=a*k}};c(d,m,["springCoeff","springLength"]);return m}},{"ngraph.expose":15,"ngraph.merge":24,"ngraph.random":25}],15:[function(e,g,l){function d(d,b,c){d.hasOwnProperty(c)&&"function"!==typeof b[c]&&(b[c]=function(a){return void 0!==
+a?(d[c]=a,b):d[c]})}g.exports=function(m,b,c){if("[object Array]"===Object.prototype.toString.call(c))for(var a=0;a<c.length;++a)d(m,b,c[a]);else for(a in m)d(m,b,a)}},{}],16:[function(e,g,l){function d(a,b){this.pos=new m(a,b);this.prevPos=new m(a,b);this.force=new m;this.velocity=new m;this.mass=1}function m(a,b){a&&"number"!==typeof a?(this.x="number"===typeof a.x?a.x:0,this.y="number"===typeof a.y?a.y:0):(this.x="number"===typeof a?a:0,this.y="number"===typeof b?b:0)}function b(a,b,f){this.pos=
+new c(a,b,f);this.prevPos=new c(a,b,f);this.force=new c;this.velocity=new c;this.mass=1}function c(a,b,c){a&&"number"!==typeof a?(this.x="number"===typeof a.x?a.x:0,this.y="number"===typeof a.y?a.y:0,this.z="number"===typeof a.z?a.z:0):(this.x="number"===typeof a?a:0,this.y="number"===typeof b?b:0,this.z="number"===typeof c?c:0)}g.exports={Body:d,Vector2d:m,Body3d:b,Vector3d:c};d.prototype.setPosition=function(a,b){this.prevPos.x=this.pos.x=a;this.prevPos.y=this.pos.y=b};m.prototype.reset=function(){this.x=
+this.y=0};b.prototype.setPosition=function(a,b,c){this.prevPos.x=this.pos.x=a;this.prevPos.y=this.pos.y=b;this.prevPos.z=this.pos.z=c};c.prototype.reset=function(){this.x=this.y=this.z=0}},{}],17:[function(e,g,l){g.exports=function(d){d=d||{};d.gravity="number"===typeof d.gravity?d.gravity:-1;d.theta="number"===typeof d.theta?d.theta:.8;var m=e("ngraph.random").random(1984),b=e("./node"),c=e("./insertStack"),a=e("./isSamePosition"),p=d.gravity,f=[],h=new c,n=d.theta,k=[],g=0,q=function(){var a=k[g];
+a?(a.quad0=null,a.quad1=null,a.quad2=null,a.quad3=null,a.body=null,a.mass=a.massX=a.massY=0,a.left=a.right=a.top=a.bottom=0):(a=new b,k[g]=a);++g;return a},r=q();return{insertBodies:function(b){var c=Number.MAX_VALUE,f=Number.MAX_VALUE,d=Number.MIN_VALUE,k=Number.MIN_VALUE,p,n=b.length;for(p=n;p--;){var e=b[p].pos.x,l=b[p].pos.y;e<c&&(c=e);e>d&&(d=e);l<f&&(f=l);l>k&&(k=l)}p=d-c;e=k-f;p>e?k=f+p:d=c+e;g=0;r=q();r.left=c;r.right=d;r.top=f;r.bottom=k;p=n-1;0<p&&(r.body=b[p]);for(;p--;)a:for(c=b[p],h.reset(),
+h.push(r,c);!h.isEmpty();)if(f=h.pop(),c=f.node,f=f.body,c.body){d=c.body;c.body=null;if(a(d.pos,f.pos)){k=3;do n=m.nextDouble(),e=(c.bottom-c.top)*n,d.pos.x=c.left+(c.right-c.left)*n,d.pos.y=c.top+e,--k;while(0<k&&a(d.pos,f.pos));if(0===k&&a(d.pos,f.pos))break a}h.push(c,d);h.push(c,f)}else{var D=f.pos.x,v=f.pos.y;c.mass+=f.mass;c.massX+=f.mass*D;c.massY+=f.mass*v;d=0;k=c.left;n=(c.right+k)/2;e=c.top;l=(c.bottom+e)/2;D>n&&(d+=1,D=k,k=n,n+=n-D);v>l&&(d+=2,v=e,e=l,l+=l-v);(v=0===d?c.quad0:1===d?c.quad1:
+2===d?c.quad2:3===d?c.quad3:null)?h.push(v,f):(v=q(),v.left=k,v.top=e,v.right=n,v.bottom=l,v.body=f,f=d,d=v,0===f?c.quad0=d:1===f?c.quad1=d:2===f?c.quad2=d:3===f&&(c.quad3=d))}},updateBodyForce:function(a){var b,c,d,h,k=0,e=0,g=1,C=0,q=1;for(f[0]=r;g;){b=f[C];var l=b.body,g=g-1,C=C+1;c=l!==a;l&&c?(c=l.pos.x-a.pos.x,d=l.pos.y-a.pos.y,h=Math.sqrt(c*c+d*d),0===h&&(c=(m.nextDouble()-.5)/50,d=(m.nextDouble()-.5)/50,h=Math.sqrt(c*c+d*d)),b=p*l.mass*a.mass/(h*h*h),k+=b*c,e+=b*d):c&&(c=b.massX/b.mass-a.pos.x,
+d=b.massY/b.mass-a.pos.y,h=Math.sqrt(c*c+d*d),0===h&&(c=(m.nextDouble()-.5)/50,d=(m.nextDouble()-.5)/50,h=Math.sqrt(c*c+d*d)),(b.right-b.left)/h<n?(b=p*b.mass*a.mass/(h*h*h),k+=b*c,e+=b*d):(b.quad0&&(f[q]=b.quad0,g+=1,q+=1),b.quad1&&(f[q]=b.quad1,g+=1,q+=1),b.quad2&&(f[q]=b.quad2,g+=1,q+=1),b.quad3&&(f[q]=b.quad3,g+=1,q+=1)))}a.force.x+=k;a.force.y+=e},options:function(a){return a?("number"===typeof a.gravity&&(p=a.gravity),"number"===typeof a.theta&&(n=a.theta),this):{gravity:p,theta:n}}}}},{"./insertStack":18,
+"./isSamePosition":19,"./node":20,"ngraph.random":25}],18:[function(e,g,l){function d(){this.stack=[];this.popIdx=0}function m(b,c){this.node=b;this.body=c}g.exports=d;d.prototype={isEmpty:function(){return 0===this.popIdx},push:function(b,c){var a=this.stack[this.popIdx];a?(a.node=b,a.body=c):this.stack[this.popIdx]=new m(b,c);++this.popIdx},pop:function(){if(0<this.popIdx)return this.stack[--this.popIdx]},reset:function(){this.popIdx=0}}},{}],19:[function(e,g,l){g.exports=function(d,e){var b=Math.abs(d.y-
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+if(h===d.offset)return!0;c=b(d.offset);var e=b(h);q[c.textureNumber].ctx.drawImage(q[e.textureNumber].canvas,e.col*f,e.row*f,f,f,c.col*f,c.row*f,f,f);q[e.textureNumber].isDirty=!0;q[c.textureNumber].isDirty=!0;n[r[h]].offset=d.offset;r[d.offset]=r[h];a();return!0},getTextures:function(){return q},getCoordinates:function(a){return n[a]},load:function(c,e){if(n.hasOwnProperty(c))e(n[c]);else{var k=new window.Image,m=h;h+=1;k.crossOrigin="anonymous";k.onload=function(){a();var c=b(m),h={offset:m};if(c.textureNumber>=
+q.length){var l=new d(g*f);q.push(l)}l=q[c.textureNumber];l.ctx.drawImage(k,c.col*f,c.row*f,f,f);r[m]=k.src;n[k.src]=h;l.isDirty=!0;e(h)};k.src=c}}};return x}},{"./texture.js":52}],55:[function(e,g,l){g.exports=function(d,e){return{_texture:0,_offset:0,size:"number"===typeof d?d:32,src:e}}},{}],56:[function(e,g,l){var d=e("./webglAtlas.js"),m=e("./webgl.js");g.exports=function(){var b,c,a,e,f,h,g=0,k=new Float32Array(64),l,q,r,x;return{load:function(g){a=g;f=m(g);b=new d(1024);c=f.createProgram("attribute vec2 a_vertexPos;\nattribute float a_customAttributes;\nuniform vec2 u_screenSize;\nuniform mat4 u_transform;\nuniform float u_tilesPerTexture;\nvarying vec3 vTextureCoord;\nvoid main(void) {\n   gl_Position = u_transform * vec4(a_vertexPos/u_screenSize, 0, 1);\nfloat corner = mod(a_customAttributes, 4.);\nfloat tileIndex = mod(floor(a_customAttributes / 4.), u_tilesPerTexture);\nfloat tilesPerRow = sqrt(u_tilesPerTexture);\nfloat tileSize = 1./tilesPerRow;\nfloat tileColumn = mod(tileIndex, tilesPerRow);\nfloat tileRow = floor(tileIndex/tilesPerRow);\nif(corner == 0.0) {\n  vTextureCoord.xy = vec2(0, 1);\n} else if(corner == 1.0) {\n  vTextureCoord.xy = vec2(1, 1);\n} else if(corner == 2.0) {\n  vTextureCoord.xy = vec2(0, 0);\n} else {\n  vTextureCoord.xy = vec2(1, 0);\n}\nvTextureCoord *= tileSize;\nvTextureCoord.x += tileColumn * tileSize;\nvTextureCoord.y += tileRow * tileSize;\nvTextureCoord.z = floor(floor(a_customAttributes / 4.)/u_tilesPerTexture);\n}",
+"precision mediump float;\nvarying vec4 color;\nvarying vec3 vTextureCoord;\nuniform sampler2D u_sampler0;\nuniform sampler2D u_sampler1;\nuniform sampler2D u_sampler2;\nuniform sampler2D u_sampler3;\nvoid main(void) {\n   if (vTextureCoord.z == 0.) {\n     gl_FragColor = texture2D(u_sampler0, vTextureCoord.xy);\n   } else if (vTextureCoord.z == 1.) {\n     gl_FragColor = texture2D(u_sampler1, vTextureCoord.xy);\n   } else if (vTextureCoord.z == 2.) {\n     gl_FragColor = texture2D(u_sampler2, vTextureCoord.xy);\n   } else if (vTextureCoord.z == 3.) {\n     gl_FragColor = texture2D(u_sampler3, vTextureCoord.xy);\n   } else { gl_FragColor = vec4(0, 1, 0, 1); }\n}");
+a.useProgram(c);h=f.getLocations(c,"a_vertexPos a_customAttributes u_screenSize u_transform u_sampler0 u_sampler1 u_sampler2 u_sampler3 u_tilesPerTexture".split(" "));a.uniform1f(h.tilesPerTexture,1024);a.enableVertexAttribArray(h.vertexPos);a.enableVertexAttribArray(h.customAttributes);e=a.createBuffer()},position:function(a,b){var c=18*a.id;k[c]=b.x-a.size;k[c+1]=b.y-a.size;k[c+2]=4*a._offset;k[c+3]=b.x+a.size;k[c+4]=b.y-a.size;k[c+5]=4*a._offset+1;k[c+6]=b.x-a.size;k[c+7]=b.y+a.size;k[c+8]=4*a._offset+
+2;k[c+9]=b.x-a.size;k[c+10]=b.y+a.size;k[c+11]=4*a._offset+2;k[c+12]=b.x+a.size;k[c+13]=b.y-a.size;k[c+14]=4*a._offset+1;k[c+15]=b.x+a.size;k[c+16]=b.y+a.size;k[c+17]=4*a._offset+3},createNode:function(a){k=f.extendArray(k,g,18);g+=1;var c=b.getCoordinates(a.src);c?a._offset=c.offset:(a._offset=0,b.load(a.src,function(b){a._offset=b.offset}))},removeNode:function(a){0<g&&--g;a.id<g&&0<g&&(a.src&&b.remove(a.src),f.copyArrayPart(k,18*a.id,18*g,18))},replaceProperties:function(a,b){b._offset=a._offset},
+updateTransform:function(a){x=!0;r=a},updateSize:function(a,b){l=a;q=b;x=!0},render:function(){a.useProgram(c);a.bindBuffer(a.ARRAY_BUFFER,e);a.bufferData(a.ARRAY_BUFFER,k,a.DYNAMIC_DRAW);x&&(x=!1,a.uniformMatrix4fv(h.transform,!1,r),a.uniform2f(h.screenSize,l,q));a.vertexAttribPointer(h.vertexPos,2,a.FLOAT,!1,3*Float32Array.BYTES_PER_ELEMENT,0);a.vertexAttribPointer(h.customAttributes,1,a.FLOAT,!1,3*Float32Array.BYTES_PER_ELEMENT,8);if(b.isDirty){var d=b.getTextures(),f;for(f=0;f<d.length;++f)if(d[f].isDirty||
+!d[f].nativeObject){var m=d[f],A=f;m.nativeObject&&a.deleteTexture(m.nativeObject);var u=a.createTexture();a.activeTexture(a["TEXTURE"+A]);a.bindTexture(a.TEXTURE_2D,u);a.texImage2D(a.TEXTURE_2D,0,a.RGBA,a.RGBA,a.UNSIGNED_BYTE,m.canvas);a.texParameteri(a.TEXTURE_2D,a.TEXTURE_MAG_FILTER,a.LINEAR);a.texParameteri(a.TEXTURE_2D,a.TEXTURE_MIN_FILTER,a.LINEAR_MIPMAP_NEAREST);a.generateMipmap(a.TEXTURE_2D);a.uniform1i(h["sampler"+A],A);m.nativeObject=u}b.clearDirty()}a.drawArrays(a.TRIANGLES,0,6*g)}}}},
+{"./webgl.js":53,"./webglAtlas.js":54}],57:[function(e,g,l){var d=e("../Utils/documentEvents.js");g.exports=function(e){function b(a,b,c){if(a&&a.size){var d=a.position;a=a.size;return d.x-a<b&&b<d.x+a&&d.y-a<c&&c<d.y+a}return!0}function c(a){a.stopPropagation?a.stopPropagation():a.cancelBubble=!0}function a(a){c(a);return!1}function g(a,b){var c,d;for(c=0;c<a.length;c+=1)if(d=a[c].apply(void 0,b))return!0}if(e.webglInputEvents)return e.webglInputEvents;var f=null,h=[],l=[],k=[],C=[],q=[],r=[],x=
+[],y,t;(function(A){var u={x:0,y:0},z=null,F=1,H=+new Date,D=function(a){g(q,[z,a]);u.x=a.clientX;u.y=a.clientY},v=function(){d.off("mousemove",D);d.off("mouseup",v)},w=function(){t=A.getBoundingClientRect()};window.addEventListener("resize",w);w();A.addEventListener("mousemove",function(a){if(!f){0===F++%7&&(w(),F=1);var d=!1,k;u.x=a.clientX-t.left;u.y=a.clientY-t.top;(k=e.getNodeAtClientPos(u,b))&&z!==k?(z=k,d=d||g(h,[z])):null===k&&z!==k&&(d=d||g(l,[z]),z=null);d&&c(a)}});A.addEventListener("mousedown",
+function(f){var h=!1,l;w();u.x=f.clientX-t.left;u.y=f.clientY-t.top;l=[e.getNodeAtClientPos(u,b),f];l[0]?(h=g(k,l),d.on("mousemove",D),d.on("mouseup",v),y=window.document.onselectstart,window.document.onselectstart=a,z=l[0]):z=null;h&&c(f)});A.addEventListener("mouseup",function(a){var d=+new Date,f;u.x=a.clientX-t.left;u.y=a.clientY-t.top;f=[e.getNodeAtClientPos(u,b),a];f[0]&&(window.document.onselectstart=y,400>d-H&&f[0]===z?g(x,f):g(r,f),H=d,g(C,f)&&c(a))})})(e.getGraphicsRoot());var z={mouseEnter:function(a){"function"===
+typeof a&&h.push(a);return z},mouseLeave:function(a){"function"===typeof a&&l.push(a);return z},mouseDown:function(a){"function"===typeof a&&k.push(a);return z},mouseUp:function(a){"function"===typeof a&&C.push(a);return z},mouseMove:function(a){"function"===typeof a&&q.push(a);return z},click:function(a){"function"===typeof a&&r.push(a);return z},dblClick:function(a){"function"===typeof a&&x.push(a);return z},mouseCapture:function(a){f=a},releaseMouseCapture:function(){f=null}};return e.webglInputEvents=
+z}},{"../Utils/documentEvents.js":40}],58:[function(e,g,l){var d=e("./parseColor.js");g.exports=function(e){return{color:d(e)}}},{"./parseColor.js":51}],59:[function(e,g,l){var d=e("./webgl.js");g.exports=function(){var e=2*(2*Float32Array.BYTES_PER_ELEMENT+Uint32Array.BYTES_PER_ELEMENT),b,c,a,g,f,h=0,l,k=new ArrayBuffer(16*e),C=new Float32Array(k),q=new Uint32Array(k),r,x,y,t;return{load:function(e){c=e;g=d(e);b=g.createProgram("attribute vec2 a_vertexPos;\nattribute vec4 a_color;\nuniform vec2 u_screenSize;\nuniform mat4 u_transform;\nvarying vec4 color;\nvoid main(void) {\n   gl_Position = u_transform * vec4(a_vertexPos/u_screenSize, 0.0, 1.0);\n   color = a_color.abgr;\n}",
+"precision mediump float;\nvarying vec4 color;\nvoid main(void) {\n   gl_FragColor = color;\n}");c.useProgram(b);f=g.getLocations(b,["a_vertexPos","a_color","u_screenSize","u_transform"]);c.enableVertexAttribArray(f.vertexPos);c.enableVertexAttribArray(f.color);a=c.createBuffer()},position:function(a,b,c){var d=6*a.id;C[d]=b.x;C[d+1]=b.y;q[d+2]=a.color;C[d+3]=c.x;C[d+4]=c.y;q[d+5]=a.color},createLink:function(a){if((h+1)*e>k.byteLength){var b=new ArrayBuffer(2*k.byteLength),c=new Float32Array(b),
+d=new Uint32Array(b);d.set(q);C=c;q=d;k=b}h+=1;l=a.id},removeLink:function(a){0<h&&--h;a.id<h&&0<h&&g.copyArrayPart(q,6*a.id,6*h,6)},updateTransform:function(a){t=!0;y=a},updateSize:function(a,b){r=a;x=b;t=!0},render:function(){c.useProgram(b);c.bindBuffer(c.ARRAY_BUFFER,a);c.bufferData(c.ARRAY_BUFFER,k,c.DYNAMIC_DRAW);t&&(t=!1,c.uniformMatrix4fv(f.transform,!1,y),c.uniform2f(f.screenSize,r,x));c.vertexAttribPointer(f.vertexPos,2,c.FLOAT,!1,3*Float32Array.BYTES_PER_ELEMENT,0);c.vertexAttribPointer(f.color,
+4,c.UNSIGNED_BYTE,!0,3*Float32Array.BYTES_PER_ELEMENT,8);c.drawArrays(c.LINES,0,2*h);l=h-1},bringToFront:function(a){l>a.id&&g.swapArrayPart(C,6*a.id,6*l,6);0<l&&--l},getFrontLinkId:function(){return l}}}},{"./webgl.js":53}],60:[function(e,g,l){var d=e("./webgl.js");g.exports=function(){var e=3*Float32Array.BYTES_PER_ELEMENT+Uint32Array.BYTES_PER_ELEMENT,b,c,a,g,f,h=new ArrayBuffer(16*e),l=new Float32Array(h),k=new Uint32Array(h),C=0,q,r,x,y;return{load:function(e){c=e;f=d(e);b=f.createProgram("attribute vec3 a_vertexPos;\nattribute vec4 a_color;\nuniform vec2 u_screenSize;\nuniform mat4 u_transform;\nvarying vec4 color;\nvoid main(void) {\n   gl_Position = u_transform * vec4(a_vertexPos.xy/u_screenSize, 0, 1);\n   gl_PointSize = a_vertexPos.z * u_transform[0][0];\n   color = a_color.abgr;\n}",
+"precision mediump float;\nvarying vec4 color;\nvoid main(void) {\n   gl_FragColor = color;\n}");c.useProgram(b);g=f.getLocations(b,["a_vertexPos","a_color","u_screenSize","u_transform"]);c.enableVertexAttribArray(g.vertexPos);c.enableVertexAttribArray(g.color);a=c.createBuffer()},position:function(a,b){var c=a.id;l[4*c]=b.x;l[4*c+1]=-b.y;l[4*c+2]=a.size;k[4*c+3]=a.color},updateTransform:function(a){y=!0;x=a},updateSize:function(a,b){q=a;r=b;y=!0},removeNode:function(a){0<C&&--C;a.id<C&&0<C&&f.copyArrayPart(k,
+4*a.id,4*C,4)},createNode:function(){if((C+1)*e>=h.byteLength){var a=new ArrayBuffer(2*h.byteLength),b=new Float32Array(a),c=new Uint32Array(a);c.set(k);l=b;k=c;h=a}C+=1},replaceProperties:function(){},render:function(){c.useProgram(b);c.bindBuffer(c.ARRAY_BUFFER,a);c.bufferData(c.ARRAY_BUFFER,h,c.DYNAMIC_DRAW);y&&(y=!1,c.uniformMatrix4fv(g.transform,!1,x),c.uniform2f(g.screenSize,q,r));c.vertexAttribPointer(g.vertexPos,3,c.FLOAT,!1,4*Float32Array.BYTES_PER_ELEMENT,0);c.vertexAttribPointer(g.color,
+4,c.UNSIGNED_BYTE,!0,4*Float32Array.BYTES_PER_ELEMENT,12);c.drawArrays(c.POINTS,0,C)}}}},{"./webgl.js":53}],61:[function(e,g,l){var d=e("./parseColor.js");g.exports=function(e,b){return{size:"number"===typeof e?e:10,color:d(b)}}},{"./parseColor.js":51}],62:[function(e,g,l){g.exports="0.8.1"},{}]},{},[1])(1)});
diff --git a/datafiles/static/hackage.css b/datafiles/static/hackage.css
index b6ce49868..4dafea682 100644
--- a/datafiles/static/hackage.css
+++ b/datafiles/static/hackage.css
@@ -64,6 +64,8 @@ h5 { font-size: 100%;   /* 13pt */ }
 
 select, input, button, textarea {
 	font:99% sans-serif;
+    margin: 0.5em;
+    padding: 0.1em;
 }
 
 table {
@@ -188,7 +190,7 @@ pre {
   background: rgb(41,56,69);
   border-top: 5px solid rgb(78,98,114);
   color: #ddd;
-  padding: 0.2em;
+  padding: 0.2em 0.2em 0.5em;
   position: relative;
   text-align: left;
   font-size: 125%;
@@ -620,7 +622,7 @@ p.tip {
 
 /* Misc admin forms */
 
-form.box {
+.box {
   background: #faf9dc;
   border: 1px solid #d8d7ad;
   padding: 0.5em 1em;
diff --git a/datafiles/static/images/sort_asc.png b/datafiles/static/images/sort_asc.png
new file mode 100644
index 000000000..e1ba61a80
Binary files /dev/null and b/datafiles/static/images/sort_asc.png differ
diff --git a/datafiles/static/images/sort_asc_disabled.png b/datafiles/static/images/sort_asc_disabled.png
new file mode 100644
index 000000000..fb11dfe24
Binary files /dev/null and b/datafiles/static/images/sort_asc_disabled.png differ
diff --git a/datafiles/static/images/sort_both.png b/datafiles/static/images/sort_both.png
new file mode 100644
index 000000000..af5bc7c5a
Binary files /dev/null and b/datafiles/static/images/sort_both.png differ
diff --git a/datafiles/static/images/sort_desc.png b/datafiles/static/images/sort_desc.png
new file mode 100644
index 000000000..0e156deb5
Binary files /dev/null and b/datafiles/static/images/sort_desc.png differ
diff --git a/datafiles/static/images/sort_desc_disabled.png b/datafiles/static/images/sort_desc_disabled.png
new file mode 100644
index 000000000..c9fdd8a15
Binary files /dev/null and b/datafiles/static/images/sort_desc_disabled.png differ
diff --git a/datafiles/static/jquery.min.js b/datafiles/static/jquery.min.js
new file mode 100644
index 000000000..e83647587
--- /dev/null
+++ b/datafiles/static/jquery.min.js
@@ -0,0 +1,5 @@
+/*! jQuery v1.12.4 | (c) jQuery Foundation | jquery.org/license */
+!function(a,b){"object"==typeof module&&"object"==typeof module.exports?module.exports=a.document?b(a,!0):function(a){if(!a.document)throw new Error("jQuery requires a window with a document");return b(a)}:b(a)}("undefined"!=typeof window?window:this,function(a,b){var c=[],d=a.document,e=c.slice,f=c.concat,g=c.push,h=c.indexOf,i={},j=i.toString,k=i.hasOwnProperty,l={},m="1.12.4",n=function(a,b){return new n.fn.init(a,b)},o=/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,p=/^-ms-/,q=/-([\da-z])/gi,r=function(a,b){return b.toUpperCase()};n.fn=n.prototype={jquery:m,constructor:n,selector:"",length:0,toArray:function(){return e.call(this)},get:function(a){return null!=a?0>a?this[a+this.length]:this[a]:e.call(this)},pushStack:function(a){var b=n.merge(this.constructor(),a);return b.prevObject=this,b.context=this.context,b},each:function(a){return n.each(this,a)},map:function(a){return this.pushStack(n.map(this,function(b,c){return a.call(b,c,b)}))},slice:function(){return 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index 000000000..205d1680c
--- /dev/null
+++ b/datafiles/templates/Html/graph.html.st
@@ -0,0 +1,299 @@
+<!DOCTYPE html>
+<html>
+
+    <head>
+        <title>Hackage Dependencies Graph</title>
+        <script src="/static/graph/vivagraph.js"></script>
+        <script src="/static/jquery.min.js"></script>`
+        <script src="/static/graph/tmpl.js"></script>
+
+        <link rel="stylesheet" href="/static/graph/graph.css">
+    </head>
+
+    <body>
+        <div class="graph-full-size" id="graph">
+            <div class="container row">
+                <div class="search col-xs-12 col-sm-6 col-md-4">
+                    <form class="search-form" role="search">
+                        <div class="input-group">
+                            <input class="form-control no-shadow" type="text" placeholder="enter a search term">
+                            <span class="input-group-btn">
+                                <button class="btn" id="go" tabindex="-1">Go</button>
+                                <button onclick="clearSuggestion();" class="btn" tabindex="-1">Clear</button>
+                            </span>
+                        </div>
+                    </form>
+                </div>
+            </div>
+            <div class="navigation-help">
+                <div class="label about"></div>
+            </div>
+        </div>
+        <div id="result"></div>
+        <div id="tooltip"></div>
+        <div id="log"></div>
+    </body>
+    <script type='text/javascript'>
+
+        \$.getJSON('/packages/graph.json', onLoad)
+
+        function onLoad(json) {
+            var graphGenerator = Viva.Graph.generator();
+            var graph = Viva.Graph.graph();
+
+            // generate nodes and links
+            for (var i = 0; i < json.length; i++) {
+                var node = json[i]
+                graph.addNode(node.name, node.id);
+                for (var j = node.deps.length - 1; j >= 0; j--)
+                    graph.addLink(node.name, node.deps[j])
+            }
+
+            var layout = Viva.Graph.Layout.forceDirected(graph, {
+                springLength: 150,
+                springCoeff: 0.0001,
+                dragCoeff: 0.002,
+                gravity: -1.2
+            });
+
+            // for faster results
+            precompute(200, renderGraph);
+
+            function precompute(iterations, callback) {
+                // 10 iterations per event loop cycle:
+                var i = 0;
+                while (iterations-- > 0 && i++ < 10) layout.step();
+                if (iterations > 0)
+                    setTimeout(function() {
+                        precompute(iterations, callback);
+                    }, 0);
+                else callback();
+            }
+
+            function renderGraph() {
+                var graphicsOptions = {
+                    clearColor: true,
+                    clearColorValue: { // use black color to erase background
+                        r: 0,
+                        g: 0,
+                        b: 0,
+                        a: 1
+                    }
+                };
+                var graphics = Viva.Graph.View.webglGraphics(graphicsOptions);
+
+                var renderer = Viva.Graph.View.renderer(graph, {
+                    layout: layout,
+                    container: document.getElementById('graph'),
+                    graphics: graphics,
+                    renderLinks: true,
+                    prerender: true
+                });
+
+                // fix node positions
+                graph.forEachNode(function(node) {
+                    layout.pinNode(node, true);
+                });
+
+                var events = Viva.Graph.webglInputEvents(graphics, graph);
+
+                events.mouseEnter(function(node) {
+
+                    var count = nodeCount(node);
+                    var ui = graphics.getNodeUI(node.id);
+
+                    var pos = ui.position;
+                    graphics.transformGraphToClientCoordinates(pos);
+                    var data = {
+                        "top": pos.y + 'px',
+                        "left": pos.x + 'px',
+                        "name": node.id,
+                        "dependencies": count[1],
+                        "dependents": count[0]
+                    };
+                    document.getElementById("tooltip").innerHTML = tmpl("tooltip-tmpl", data);
+
+                    highlightNode(node.id);
+                })
+                .mouseLeave(function(node) {
+                    document.getElementById("tooltip").innerHTML = '';
+                }).dblClick(function(node) {
+
+                }).click(function(node) {
+
+                    var count = nodeCount(node);
+                    var data = {
+                        "package": node.id,
+                        "dependencies": count[1],
+                        "dependents": count[0]
+                    };
+                    document.getElementById("result").innerHTML = tmpl("package-tmpl", data);
+                });
+
+
+                renderer.run();
+
+                \$('.input-group input').on('keyup', function() {
+                    var val = \$.trim(this.value);
+                    var resultSet = \$.grep(json, function(e) {
+                        return (e.name.indexOf(val) != -1);
+                    });
+                    var data = {
+                        "packages": [],
+                        "count": resultSet.length
+                    };
+                    if (val.length > 0) {
+                        \$.each(resultSet, function(i) {
+                            var nodeInfo = graph.getNode(resultSet[i].name);
+                            // console.dir(nodeInfo)
+                            count = nodeCount(nodeInfo);
+                            data.packages.push({
+                                "name": nodeInfo.id,
+                                "dependents": count[0],
+                                "dependencies": count[1]
+                            })
+
+                        });
+                        document.getElementById("log").innerHTML = tmpl("search-tmpl", data);
+                    }
+                });
+
+                function clearSuggestion() {
+                    alert("lol");
+                    document.getElementById("log").innerHTML = '';
+
+                }
+
+                \$('.search-form').submit(function(e) {
+                    document.getElementById("log").innerHTML = '';
+                    e.preventDefault();
+                    var nodeId = \$('.input-group input').val();
+                    if (graph.getNode(nodeId)) {
+                        var pos = layout.getNodePosition(nodeId);
+                        renderer.reset()
+                        renderer.moveTo(pos.x, pos.y);
+                        highlightNode(nodeId);
+                    }
+                });
+
+                var prevSelected;
+                var prevSelectedLinks;
+
+                function highlightNode(nodeId) {
+                    var ui = graphics.getNodeUI(nodeId);
+                    var nodeInfo = graph.getNode(nodeId);
+
+                    if (prevSelected) {
+                        prevSelected.color = 0x00a2e8ff;
+                        prevSelected.size = 10;
+                    }
+
+                    prevSelected = ui;
+                    if (prevSelectedLinks) {
+                        prevSelectedLinks.forEach(function(link) {
+                            var lol = graphics.getNodeUI(link[0].id);
+                            var loll = graphics.getLinkUI(link[1].id);
+                            lol.color = 0x00a2e8ff;
+                            loll.color = 0xb3b3b3ff
+                        });
+                    }
+
+                    prevSelectedLinks = [];
+                    graph.forEachLinkedNode(nodeId, function(linkedNode, link) {
+                        var lol = graphics.getNodeUI(linkedNode.id);
+                        var loll = graphics.getLinkUI(link.id);
+                        prevSelectedLinks.push([linkedNode, link])
+                        lol.color = 0xFFFFFFff;
+                        loll.color = 0xFFA500ff
+                    });
+                    ui.color = 0xFFA500ff;
+                    ui.size = 20;
+                }
+
+                var graphRect = layout.getGraphRect();
+                var graphSize = Math.min(graphRect.x2 - graphRect.x1, graphRect.y2 - graphRect.y1);
+                var screenSize = Math.min(window.innerHeight, window.innerWidth);
+                var desiredScale = screenSize / graphSize;
+                zoomOut(desiredScale, 1);
+
+                function zoomOut(desiredScale, currentScale) {
+                    if (desiredScale < currentScale) {
+                        currentScale = renderer.zoomOut();
+                        setTimeout(function() {
+                            zoomOut(desiredScale, currentScale);
+                        }, 1);
+                    }
+                }
+            }
+
+            // Utility function to return o of dependencies and dependents
+            function nodeCount(node) {
+                var dependents = 0,
+                    dependencies = 0;
+                for (var i = node.links.length - 1; i >= 0; i--) {
+                    node.links[i].fromId == node.id ? dependencies++ : dependents++;
+                }
+                return [dependents, dependencies];
+            }
+
+        }
+
+    </script>
+
+    <!-- tmpl.js templates for description on click, search results and tooltip -->
+    <script type="text/x-tmpl" id="package-tmpl">
+        <div class="node-details">
+            <div class="container-fluid row">
+                <div class="hidden-xs">
+                    <div class="col-xs-6"><a target="_blank" href="/package/{%=o.package%}"><h4  title="{%=o.package%}">{%=o.package%}</h4></a></div>
+                    <div class="col-xs-3">
+                        <div class="row">
+                            <h2 class="in-degree" id="258998">{%=o.dependents%}</h2></div>
+                        <div class="row small">dependents</div>
+                    </div>
+                    <div class="col-xs-3">
+                        <div class="row">
+                            <h2 class="out-degree" id="258998">{%=o.dependencies%}</h2></div>
+                        <div class="row small">dependency</div>
+                    </div>
+                </div>
+                <div class="visible-xs-block">
+                    <div class="row info-block">
+                        <div class="col-xs-6 no-overflow"><a target="_blank" href="/package/{%=o.package%}">{%=o.package%}</a></div>
+                        <div class="in-degree col-xs-3" id="258998">{%=o.dependents%}</div>
+                        <div class="out-degree col-xs-3" id="258998">{%=o.dependencies%}</div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </script>
+
+    <script type="text/x-tmpl" id="search-tmpl">
+        <div class="window-container search-results-window">
+            <h4 class="window-title"><span >Found </span><strong >{%=o.count %}</strong><span > matches</span></h4>
+            <div class="window-list-content">
+                <div style="position:relative;height:43400px;">
+                    <div style="-ms-transform:translate(0px, 0px);-webkit-transform:translate(0px, 0px);transform:translate(0px, 0px);">
+                        <div>
+                            {% for (var i=0; i
+                            <o.packages.length; i++) { %} <div class="row">
+                                <div class="no-oveflow col-md-6 col-xs-6">
+                                    <a target="_blank" href="/package/{%=o.packages[i].name%}"><span class="node-focus" id="64">{%=o.packages[i].name %}</span></a>
+
+                                </div>
+                                <div class="in-degree col-md-3 col-xs-3" id="64">{%=o.packages[i].dependents %}</div>
+                                <div class="out-degree col-md-3 col-xs-3" id="64">{%=o.packages[i].dependencies %}</div>
+                        </div>
+                        {% } %}
+                    </div>
+                </div>
+            </div>
+        </div>
+        </div>
+    </script>
+
+    <script type="text/x-tmpl" id="tooltip-tmpl">
+        <div class="node-hover-tooltip" style="left: {%=o.left %}; top: {%=o.top %};"><span>{%=o.name %}</span><span class="in-degree">{%=o.dependents %}</span><span class="out-degree">{%=o.dependencies %}</span></div>
+    </script>
+
+</html>
diff --git a/datafiles/templates/Html/package-page.html.st b/datafiles/templates/Html/package-page.html.st
index 6c376346f..f0ff4a750 100644
--- a/datafiles/templates/Html/package-page.html.st
+++ b/datafiles/templates/Html/package-page.html.st
@@ -6,6 +6,7 @@
     $package.name$$if(package.optional.hasSynopsis)$: $package.optional.synopsis$$endif$
   </title>
   <link rel="canonical" href="$baseurl$/package/$package.name$" />
+  <script src="/static/jquery.min.js"></script>
 </head>
 
 <body>
@@ -15,10 +16,10 @@
     </a>})$
 
   <div id="content">
-
     <h1>The $package.name$ package</h1>
     <div style="font-size: small">
-      [<a href="/packages/tags">Tags</a>:$tags$]
+      [ <a href="/packages/tags">Tags: </a>$tags$ ]
+      [ <a href="/package/$package.name$/tags/edit">Propose Tags </a> ]
     </div>
 
     $if(isDeprecated)$
@@ -33,15 +34,14 @@
     $endif$
 
     $if(package.optional.hasReadme)$
-    <hr>
-    [<a href="#readme">Skip to Readme</a>]
+      <hr>
+      [<a href="#readme">Skip to Readme</a>]
     $endif$
 
     <div id="properties">
     <h2>Properties</h2>
     <table class="properties">
       <tbody>
-
         <tr>
           <th>Versions</th>
           <td>$versions$</td>
@@ -75,6 +75,7 @@
           <th>Author</th>
           <td>$package.author$</td>
         </tr>
+
         <tr>
           <th>Maintainer</th>
           <td>$package.maintainer$</td>
@@ -140,19 +141,58 @@
         </tr>
         $endif$
 
+        $if(hasrdeps)$
+        <tr>
+          <th>ReverseDependencies</th>
+          <td>$rdeps$</td>
+        </tr>
+        <script>
+          \$('.revdepdetails').click(function(e) {
+            e.preventDefault();
+            var html = '$rdepsummary$'
+            modal.open({ content: html});
+
+          });
+        </script>
+        $endif$
+
+        $if(hasexecs)$
+        <tr>
+          <th>Executables</th>
+          <td>$executables$</td>
+        </tr>
+        $endif$
+
         <tr>
           <th>Downloads</th>
           <td>$totalDownloads$ total ($recentDownloads$ in the last 30 days)</td>
         </tr>
 
         <tr>
-          <th>Votes</th>
-          <td>$votesSection$</td>
+          <th>Rating</th>
+          <td>$score$ ($votes$ ratings)
+          $if(userRating)$
+            <input type="hidden" id="userRating" value="$userRating$">
+          $endif$
+              [<a href="" class="clear-rating">clear rating</a>]
+            <ul class="star-rating">
+              <li class="star" id="1">&lambda;</li>
+              <li class="star" id="2">&lambda;</li>
+              <li class="star" id="3">&lambda;</li>
+            </ul>
+          </td>
+        </tr>
+
+        <tr>
+            <th>Related</th>
+            <td>$related$</td>
         </tr>
+
         <tr>
           <th>Status</th>
           <td>$buildStatus$</td>
         </tr>
+
       </tbody>
     </table>
     </div> <!-- /properties -->
@@ -190,9 +230,8 @@
     </div>
     $endif$
 
-  </div> <!-- /content -->
-
+  </div>
+  $packagePageAssets()$
   $footer()$
-
 </body>
 </html>
diff --git a/datafiles/templates/Html/table-interface.html.st b/datafiles/templates/Html/table-interface.html.st
new file mode 100644
index 000000000..6f398a485
--- /dev/null
+++ b/datafiles/templates/Html/table-interface.html.st
@@ -0,0 +1,79 @@
+<!DOCTYPE html>
+<html>
+
+    <head>
+        $hackageCssTheme()$
+        <script src="/static/jquery.min.js"></script>
+        <script src="/static/datatables/jquery.dataTables.min.js"></script>
+        <link rel="stylesheet" href="/static/datatables/jquery.dataTables.min.css">
+        <title>All packages by name | Hackage</title>
+    </head>
+
+    <body>
+        $hackagePageHeader()$
+
+        <div id="content">
+            <h2>$heading$</h2>
+            $content$
+            <table id="table" style="width:650" class="fancy row-border order-column compact">
+                <thead>
+                    <tr>
+                        <th><div style="width:100px">Name</div></th>
+                        <th><div style="width:40px">DLs</div></th>
+                        <th><div style="width:50px">Rating</div></th>
+                        <th><div style="width:50px">Rev Deps</div></th>
+                        <th><div style="width:160px">Description</div></th>
+                        <th><div style="width:140px">Tags</div></th>
+                        <th><div style="width:100px">Maintainer</div></th>
+                    </tr>
+                </thead>
+                <tbody>
+                    $tabledata$
+                </tbody>
+            </table>
+            $footer$
+        </div>
+        <script>
+            function filterGlobal() {
+                \$('#table').DataTable().search(
+                    true, true
+                ).draw();
+            }
+
+            \$(document).ready(function() {
+
+                \$.extend( jQuery.fn.dataTableExt.oSort, {
+                   "package-pre": function ( a ) {
+                        return [a.search(/deprecated/),a];
+                    },
+                    "package-asc": function (a, b) {
+                        return ((a < b) ? -1 : ((a > b) ? 1 : 0));
+                    },
+                    "package-desc": function (a, b) {
+                        return ((a < b) ? 1 : ((a > b) ?  -1 : 0));
+                    }
+                } );
+
+                \$('#table').removeAttr('width').DataTable({
+                    "bProcessing": true,
+                    "bDeferRender": true,
+                    "autoWidth": false,
+		    "pageLength":50,
+                    "language": {
+                          "search": "Filter:"
+                     },
+                    "columnDefs": [
+			{ type: "package", "targets": [0] },
+                        { className: "dt-body-right", "targets": [1, 2, 3 ] }
+                     ]
+                });
+
+                \$('input.global_filter').on('keyup click', function() {
+                    filterGlobal();
+                });
+            });
+
+        </script>
+    </body>
+
+</html>
diff --git a/datafiles/templates/Html/tag-edit.html.st b/datafiles/templates/Html/tag-edit.html.st
new file mode 100644
index 000000000..fcf7c132a
--- /dev/null
+++ b/datafiles/templates/Html/tag-edit.html.st
@@ -0,0 +1,157 @@
+<!DOCTYPE html>
+<html>
+
+    <head>
+        $hackageCssTheme()$
+        <title>Edit package tags | Hackage</title>
+        <script src="/static/jquery.min.js"></script>
+        <style>
+            .accept {
+                color: green;
+            }
+            .reject {
+                color: red;
+            }
+            .eadd,
+            .edel {
+                clear: both;
+            }
+            #additions,
+            #deletions {
+                list-style: none;
+                margin: 0px;
+            }
+            #additions li,
+            #deletions li {
+                padding: 1%;
+                margin: 1%;
+                float: left;
+                display: inline-block;
+                border: 1px solid black;
+            }
+            #additions:hover,
+            #deletions:hover {
+                background: white;
+            }
+        </style>
+    </head>
+
+    <body>
+        $hackagePageHeader()$
+        <div id="content">
+            Set tags for <a href="/package/$pkgname$">$pkgname$</a>
+            <div class="box">
+                <p><b>Current Tags</b>
+                    <br />$tags$</p>
+                <form method="post" action="/package/$pkgname$/tags">
+                    <input type="hidden" name="_method" id="_method" value="PUT" />
+                    <dl>
+                        <dd>
+                            <label for="addns">Propose Additions </label>
+                            <input type="text" value="" name="addns" id="addns" />
+                        </dd>
+                    </dl>
+                    <dl>
+                        <dd>
+                            <label for="delns">Propose Deletions </label>
+                            <input type="text" value="" name="delns" id="delns" />
+                        </dd>
+                    </dl>
+                    <input hidden="true" type="text" value="" name="raddns" id="raddns" />
+                    <input hidden="true" type="text" value="" name="rdelns" id="rdelns" />
+                    <input type="submit" value="Propose tags" />
+                </form>
+                $if(isuser)$
+                <div class="proposals">
+                    <big>Other proposals</big>
+                    <span class="eadd"><br><b>additions: </b>$addns$</span>
+                    <span class="edel"><br><b>deletions: </b>$delns$</span>
+                </div>
+                $endif$ $if(istrustee)$
+                <div id="trustee" class="proposals">
+                    <big>Proposals</big>
+                    <span class="eadd"><br><b>additions: </b>
+                  <ul id ="additions"></ul>
+              </span>
+                    <div style="clear:both"> </div>
+                    <span class="edel"><br><b>deletions: </b>
+                  <ul id = "deletions"></ul>
+              </span>
+                </div>
+                <script>
+                    var insert = function(element, tag) {
+                        if (element.val().trim())
+                            element.val(element.val() + ',' + tag)
+                        else
+                            element.val(tag)
+                    }
+
+                    \$("#trustee").on("click", "li span", function(e) {
+                        \$(this).parent().hide()
+                        var tag = \$(this).parent().text().trim().split(' ')[0]
+                        if (\$(this).attr('class') == 'accept') {
+                            if (\$(this).parent().parent().attr('id') == 'additions')
+                                insert(\$("#addns"), tag)
+                            else if (\$(this).parent().parent().attr('id') == 'deletions')
+                                insert(\$("#delns"), tag)
+                        } else if (\$(this).attr('class') == 'reject') {
+                            if (\$(this).parent().parent().attr('id') == 'additions')
+                                insert(\$("#raddns"), tag)
+                            else if (\$(this).parent().parent().attr('id') == 'deletions')
+                                insert(\$("#rdelns"), tag)
+                        }
+                    })
+                    if ("$delns$".trim() == "" && "$addns$".trim() == "")\$('.proposals').each(function(i, obj) {
+                        \$(this).hide()
+                    });
+                    var aList = \$('#additions')
+                    var dList = \$("#deletions")
+
+                    if ("$addns$".trim() != "") {
+                        var ads = "$addns$".replace(/\s/g, '').split(',')
+                        \$.each(ads, function(i) {
+                            var li = \$('<li/>')
+                                .text(ads[i])
+                                .appendTo(aList);
+                            var aaa = \$("<span class='accept'> &#x2713;</span> <span class='reject'>&#x2717;</span>")
+                                .appendTo(li);
+                        });
+                    }
+
+
+                    if ("$delns$".trim() != "") {
+                        var dels = "$delns$".replace(/\s/g, '').split(',')
+
+                        \$.each(dels, function(i) {
+                            var li = \$('<li/>')
+                                .text(dels[i])
+                                .appendTo(dList);
+                            var aaa = \$("<span class='accept'> &#x2713;</span> <span class='reject'>&#x2717;<span>")
+                                .appendTo(li);
+                        });
+                    }
+
+                </script>
+                $endif$
+                <div style="clear:both"> </div>
+            </div>
+        </div>
+        $footer()$
+    </body>
+    <script>
+        if ("$addns$".trim() == "" || "$delns$".trim() == "") {
+            if ("$addns$".trim() != "")
+                \$(".edel").each(function(i, obj) {
+                    \$(this).hide()
+                });
+            else if ("$delns$".trim() != "")
+                \$(".eadd").each(function(i, obj) {
+                    \$(this).hide()
+                });
+            else
+                \$(".proposals").each(function(i, obj) {
+                    \$(this).hide()
+                });
+        }
+    </script>
+</html>
diff --git a/datafiles/templates/hackageCssTheme.st b/datafiles/templates/hackageCssTheme.st
index 8473ce8bf..551cffee9 100644
--- a/datafiles/templates/hackageCssTheme.st
+++ b/datafiles/templates/hackageCssTheme.st
@@ -1,2 +1,3 @@
+<meta name="viewport" content="width=device-width, initial-scale=1">
 <link rel="stylesheet" href="/static/hackage.css" type="text/css" />
 <link rel="search" type="application/opensearchdescription+xml" title="Hackage" href="/packages/opensearch.xml" />
diff --git a/datafiles/templates/hackagePageHeader.st b/datafiles/templates/hackagePageHeader.st
index 3ee6795d8..9d36fce0b 100644
--- a/datafiles/templates/hackagePageHeader.st
+++ b/datafiles/templates/hackagePageHeader.st
@@ -11,7 +11,7 @@
       </form>
     </li>
 
-    <li><a href="/packages/">Browse</a></li>
+    <li><a href="/packages/browse">Browse</a></li>
 
     <li><a href="/packages/recent">What's new</a></li>
 
diff --git a/datafiles/templates/index.html.st b/datafiles/templates/index.html.st
index 497664625..f6d788136 100644
--- a/datafiles/templates/index.html.st
+++ b/datafiles/templates/index.html.st
@@ -16,14 +16,13 @@ $hackagePageHeader()$
 Each package is in the <a href="http://www.haskell.org/cabal">Cabal</a> format,
 a standard way of packaging Haskell source code that makes it easy to build
 and install.
-(Hackage and Cabal are components of a broader Haskell infrastructure effort
-called <a href="http://hackage.haskell.org/trac/hackage/">Hackage</a>.)
+
 These pages are a basic web interface to the Hackage package database.
 </p>
 
-<p>This isn't the <em>official</em> Hackage. It's an in-progress
-rewrite of the server using the <a href="/package/happstack">happstack</a> web
-framework. <!-- links to places to comment -->
+  <p>This isn't the <em>official</em> Hackage, which is at
+  <a href="http://hackage.haskell.org">http://hackage.haskell.org</a>.
+  Rather, this is being run either for development purposes or by a third-party.
 </p>
 
 <h3>Finding packages</h3>
@@ -44,6 +43,7 @@ search of package descriptions:
 
 <p>There are a few other package indices:</p>
 <ul>
+<li><a href="/packages/browse">Browsable package index</a></li>
 <li><a href="/packages/tags">All tags</a></li>
 <li><a href="/packages/names">All packages by name</a>, with tags</li>
 <li><a href="/packages/reverse">All packages with reverse dependencies</a></li>
@@ -83,4 +83,3 @@ We'd like to make it as simple as possible for anyone to <a href="https://github
 </div>
 </body>
 </html>
-
diff --git a/datafiles/templates/packagePageAssets.st b/datafiles/templates/packagePageAssets.st
new file mode 100644
index 000000000..4688b7a99
--- /dev/null
+++ b/datafiles/templates/packagePageAssets.st
@@ -0,0 +1,190 @@
+<style>
+  #overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: #000;
+    opacity: 0.5;
+    filter: alpha(opacity=50);
+  }
+
+  #modal {
+    position: absolute;
+    width: 200px !;
+    background: rgba(0, 0, 0, 0.2);
+    border-radius: 14px;
+    padding: 8px;
+  }
+
+  #content {
+    border-radius: 8px;
+    background: #fff;
+    padding: 20px;
+  }
+
+  #close {
+    position: absolute;
+    background: url(data:image/png;base64,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) 0 0 no-repeat;
+    width: 24px;
+    height: 27px;
+    display: block;
+    text-indent: -9999px;
+    top: -7px;
+    right: -7px;
+  }
+
+  .cool {
+    color: gold;
+  }
+
+  .uncool {
+    color: black;
+  }
+
+  .star-rating {
+    margin: 0;
+    list-style-type: none;
+    font-size: 150%;
+    color: black;
+  }
+
+  .star-rating li {
+    float: left;
+    margin: 0 1% 0 1%;
+  }
+
+  .clear-rating {
+    font-size: small;
+  }
+
+</style>
+
+<script>
+  var modal = (function() {
+    var
+      method = {},
+      overlay,
+      modal,
+      content,
+      close;
+
+    // Center the modal in the viewport
+    method.center = function() {
+      var top, left;
+
+      top = Math.max(\$(window).height() - modal.outerHeight(), 0) / 2;
+      left = Math.max(\$(window).width() - modal.outerWidth(), 0) / 2;
+
+      modal.css({
+        top: top + \$(window).scrollTop(),
+        left: left + \$(window).scrollLeft()
+      });
+    };
+
+    // Open the modal
+    method.open = function(settings) {
+      content.empty().append(settings.content);
+
+      modal.css({
+        width: settings.width || 'auto',
+        height: settings.height || 'auto'
+      });
+
+      method.center();
+      \$(window).bind('resize.modal', method.center);
+      modal.show();
+      overlay.show();
+    };
+
+    // Close the modal
+    method.close = function() {
+      modal.hide();
+      overlay.hide();
+      content.empty();
+      \$(window).unbind('resize.modal');
+    };
+
+    // Generate the HTML and add it to the document
+    overlay = \$('<div id="overlay"></div>');
+    modal = \$('<div id="modal"></div>');
+    content = \$('<div id="content"></div>');
+    close = \$('<a id="close" href="#">close</a>');
+
+    modal.hide();
+    overlay.hide();
+    modal.append(content, close);
+
+    \$(document).ready(function() {
+      \$('body').append(overlay, modal);
+    });
+
+    close.click(function(e) {
+      e.preventDefault();
+      method.close();
+    });
+
+    return method;
+  }());
+</script>
+
+<script>
+  var votesUrl = '/package/$package.name$/votes';
+  var star = {
+    "selected": false
+  };
+  \$('.star').mouseenter(function() {
+    if (star.selected === false) {
+      fill_stars(this.id, "in");
+    }
+  });
+  \$('.star').mouseleave(function() {
+    if (star.selected === false) {
+      fill_stars(this.id, "out");
+    }
+  });
+  \$('.star').click(function() {
+    fill_stars(3, "out");
+    fill_stars(this.id, "in");
+    star.selected = true;
+    star.id = this.id;
+    var formData = {
+      score: this.id
+    }
+    \$.post(votesUrl, formData).done(function(data) {
+        if(data != "Package voted for successfully") {
+            modal.open({ content: data});
+	}
+    });
+  });
+  \$('.clear-rating').click(function(e) {
+    e.preventDefault()
+    fill_stars(3, "out");
+    star.selected = false;
+    \$.ajax({
+      url: votesUrl,
+      type: 'DELETE',
+      success: function(result) {
+        if(result != "Package vote removed successfully") {
+          modal.open({ content: result });
+	}
+      }
+    });
+  });
+  \$(function() {
+       var userRating = parseInt(\$("#userRating").val(),10);
+       if(userRating > 0) {fill_stars(userRating,"in")}
+       star.selected = true;
+       star.id=userRating
+  });
+  var fill_stars = function(num, direction) {
+    if (direction === "in")
+      for (i = 0; i <= parseInt(num); i++)
+        \$("#" + i).removeClass('uncool').addClass('cool');
+    else
+      for (i = 0; i <= parseInt(num); i++)
+        \$("#" + i).removeClass('cool').addClass('uncool');
+  }
+
+</script>
diff --git a/datafiles/templates/upload.html.st b/datafiles/templates/upload.html.st
index adfe1ffaf..fdd512f6a 100644
--- a/datafiles/templates/upload.html.st
+++ b/datafiles/templates/upload.html.st
@@ -10,7 +10,7 @@ $hackagePageHeader()$
 
 <div id="content">
 <h2>Uploading packages and package candidates</h2>
-<p>Uploading a package puts it in the <a href="/packages/">main package index</a>
+<p>Uploading a package puts it in the <a href="/packages/browse">main package index</a>
 so that anyone can download it and view information about it. You can only
 upload a package version once, so try to get it right the first time!
 </p>
diff --git a/hackage-server.cabal b/hackage-server.cabal
index 821a04528..47e9695ff 100644
--- a/hackage-server.cabal
+++ b/hackage-server.cabal
@@ -44,8 +44,15 @@ data-files:
 
   static/*.css
   static/*.ico
+  static/*.min.js
   static/*.png
 
+  static/datatables/jquery.dataTables.min.css
+  static/datatables/jquery.dataTables.min.js
+  static/graph/*.js
+  static/graph/*.css
+  static/images/*.png
+
   TUF/README.md
   TUF/mirrors.json
   TUF/root.json
@@ -161,7 +168,7 @@ executable hackage-server
     Distribution.Server.Pages.Package.HaddockTypes
     Distribution.Server.Pages.Recent
     Distribution.Server.Pages.AdminLog
-    -- [reverse index disabled] Distribution.Server.Pages.Reverse
+    Distribution.Server.Pages.Reverse
     Distribution.Server.Pages.Template
     Distribution.Server.Pages.Util
 
@@ -263,8 +270,8 @@ executable hackage-server
       Distribution.Server.Features.PreferredVersions
       Distribution.Server.Features.PreferredVersions.State
       Distribution.Server.Features.PreferredVersions.Backup
-      -- [reverse index disabled] Distribution.Server.Features.ReverseDependencies
-    -- [reverse index disabled] Distribution.Server.Features.ReverseDependencies.State
+      Distribution.Server.Features.ReverseDependencies
+      Distribution.Server.Features.ReverseDependencies.State
       Distribution.Server.Features.Tags
       Distribution.Server.Features.Tags.Backup
       Distribution.Server.Features.Tags.State
@@ -298,7 +305,7 @@ executable hackage-server
     split      >= 0.2,
     time       >= 1.1 && < 1.7,
     time-locale-compat >= 0.1.0.1,
---    old-locale >= 1.0,
+    -- old-locale >= 1.0,
     deepseq    == 1.1.* || > 1.3.0,
     transformers >= 0.3,
     -- we use Control.Monad.Except, introduced in mtl-2.2.1
@@ -335,7 +342,9 @@ executable hackage-server
     cryptohash-sha256 == 0.11.*,
     binary,
     base16-bytestring >= 0.1 && < 0.2,
-    hashable  == 1.2.*
+    hashable  == 1.2.*,
+    bimap      == 0.3.*,
+    binary
 
   if ! flag(minimal)
     build-depends:
@@ -400,7 +409,10 @@ executable hackage-mirror
     process >= 1.2.0,
     base16-bytestring >= 0.1 && < 0.2,
     hackage-security >= 0.5.1 && < 0.6,
-    hackage-security-HTTP
+    hackage-security-HTTP,
+    bimap == 0.3.*
+
+
   default-language:   Haskell2010
   default-extensions: ExistentialQuantification
                       FlexibleContexts
@@ -444,6 +456,7 @@ executable hackage-build
     unix,
     cryptohash-sha256,
     base16-bytestring >= 0.1 && < 0.2,
+    bimap == 0.3.*,
     -- Runtime dependency only:
     hscolour >= 1.8
   default-language: Haskell2010
@@ -579,6 +592,7 @@ Test-Suite PackageTests
                     Cabal,
                     test-framework,
                     test-framework-hunit,
+                    bimap      == 0.3.*,
                     HUnit
 
 Test-Suite HashTests
@@ -606,4 +620,5 @@ Test-Suite HashTests
                     vector,
                     -- test-specific dependencies
                     tasty       == 0.11.*,
+                    bimap      == 0.3.*,
                     tasty-hunit >= 0.9.2 && < 0.10