GitHub Visualizer - Enter user/repo and see the project visually
AwesomeDigest - An email newsletter for every "awesome" list on GitHub 😻
Codeology - Open-source algorithm that visualizes GitHub projects
GIT.WTF!?! - Figure out ways to fix GIT screw-ups
Octohunt - Search to find developers in your city on Github.
Awesome GitHub Topics - Top 500 topics on GitHub that's filtered and categorized