Sweetjab - Sweetjab combines your issues and pull requests from GitHub, into a single page, to easily prioritize and delegate

Github Profile Visualizer - Tool for visualizing GitHub profiles

GitHub Visualizer - Enter user/repo and see the project visually

Git Story - Tell the story of your Git project by creating video animations (.mp4) of your commit history directly from your Git repo.

Refined GitHub - Browser extension that makes GitHub cleaner & more powerful

HubDesk - HubDesk lets you receive and respond to emails with Github issues.