Add Codacy info

README.md

@@ -134,5 +134,25 @@ PHP Fatal error:  Uncaught Error: Call to undefined function Codacy\Coverage\Uti
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 Run: ```sudo apt-get install php5-curl```
 
+## What is Codacy?
+
+[Codacy](https://www.codacy.com/) is an Automated Code Review Tool that monitors your technical debt, helps you improve your code quality, teaches best practices to your developers, and helps you save time in Code Reviews.
+
+### Among Codacy’s features:
+
+- Identify new Static Analysis issues
+- Commit and Pull Request Analysis with GitHub, BitBucket/Stash, GitLab (and also direct git repositories)
+- Auto-comments on Commits and Pull Requests
+- Integrations with Slack, HipChat, Jira, YouTrack
+- Track issues in Code Style, Security, Error Proneness, Performance, Unused Code and other categories
+
+Codacy also helps keep track of Code Coverage, Code Duplication, and Code Complexity.
+
+Codacy supports PHP, Python, Ruby, Java, JavaScript, and Scala, among others.
+
+### Free for Open Source
+
+Codacy is free for Open Source projects.
+
 ## License
 [MIT](LICENSE)