GitHub Visualizer - Enter user/repo and see the project visually
Contributions for GitHub - Show your GitHub contributions graph on your iOS Devices
Gource - Gource is a software version control visualization tool.
Learn X in Y minutes - LearnXinYminutes isn’t a good way to learn your first programming language, but it’s a great way to...
GitHub Gardener - Daily, automated commits that turn your GitHub green
The GitHub Matrix Screensaver - Latest commits from GitHub visualized Matrix-style