GitHub Visualizer - Enter user/repo and see the project visually
Fliqlo Screensaver - A screensaver that displays the time using a flip clock.
Commit Together by Github - Now add co-authors to your commits
Padbury Clock Screensaver - Minimal screensaver for Mac
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
Really Slick Screensavers - Really Slick contains free 3D OpenGL screensavers.