GitHub Metrics - Customize your profile with various plugins and metrics
Why is this interesting? - Every weekday Noah Brier & Colin Nagy (and friends) send an email about something interesting.
Contributions for GitHub - Show your GitHub contributions graph on your iOS Devices
Hacker Newsletter - Best of Hacker News in your inbox every Friday.
GitHub Contributions - All your GitHub contributions in one image
Hive - Seamless project management and collaboration for your team.