Github Profile Visualizer - Tool for visualizing GitHub profiles
Softagram - Automated visual reviews for GitHub pull requests
GitHub Visualizer - Enter user/repo and see the project visually
CodeTriage - Help out your favorite open source projects and become a better developer while doing it.
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
BountySource - BountySource is a funding platform for open-source bugs and features.