Add Rx v0.5 (#776)

* Add Rx v0.5

* Formatting

Co-authored-by: Forest Anderson <forestkzanderson@gmail.com>

Author: cloudhead

content/news/025/index.md

@@ -576,6 +576,49 @@ is coming very soon. [Join the Discord][graphite-discord] and get involved!
 [graphite-twitter]: https://twitter.com/GraphiteEditor
 [graphite-live-demo]: https://editor.graphite.design
 
+### [rx]
+
+![rx](rx_logo.png)
+
+[rx] by [@cloudhead][cloudhead] is a modern and minimalist pixel editor written
+in Rust.
+
+Rx is a pixel art editor/animator written in Rust in about 12K LOC, which
+combines a vim-like modal interface with a cursor-based editor.
+
+- Website: [https://rx.cloudhead.io](https://rx.cloudhead.io)
+- Code: <https://github.com/cloudhead/rx>
+- Community: [Discord](https://discord.gg/xHggPjfsS9)
+- Download: [rx-0.5.2-x86_64.AppImage][rx_download]
+
+Release v0.5 was just published with the following new features and updates:
+
+```markdown
+- New tool `:flood`, for filling an area with color
+- New brush mode `line`, for drawing straight lines
+- New command `:selection/flip <axis>` to flip the current selection
+- New command `:export <resize> <path>`, eg. `:export @2x meme.gif`
+- New command `:p/write <file>` to save the color palette to a file
+- New command `:p/sample` to sample view colors into palette
+- New command `:p/sort` to sort the palette colors
+- New command `:p/gradient` to add a color gradient to the palette
+- New setting `:p/height` to set the palette height in cells
+- Move between frames with `h` and `l` keys
+- Use *pan* tool in help mode
+- Fix command key ':' for non-ANSI layouts
+- Implement new command parser based on `memoir`
+- Add compatibility for non x86-64 systems
+- Support pasting from clipboard in command-line
+- Support character inputs in key mappings, eg. `map '?' :help`
+- Skip unreadable files when reading a directory
+- New, smoother animation rendering
+```
+
+[rx]: https://rx.cloudhead.io
+[rx_discord]: https://discord.gg/xHggPjfsS9
+[rx_download]: https://github.com/cloudhead/rx/releases/download/v0.5.2/rx-0.5.2-x86_64.AppImage
+[cloudhead]: https://twitter.com/cloudhead
+
 ## Library Updates
 
 ### [GGRS]