Contributions for GitHub - Show your GitHub contributions graph on your iOS Devices
Awesome GitHub Topics - Top 500 topics on GitHub that's filtered and categorized
GitHub Visualizer - Enter user/repo and see the project visually
git:logs - The definitive list of open source resources on Github
GitHub Gardener - Daily, automated commits that turn your GitHub green
Mailbrew - Automated email digests from Twitter, Reddit, YouTube & more