GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
GitHub Visualizer - Enter user/repo and see the project visually
Tower - Build Better Software. Over 100,000 developers and designers are more productive with Tower - the most powerful Git client for Mac and Windows.
Codeology - Open-source algorithm that visualizes GitHub projects
Working Copy - The powerful Git client for iOS
Octohunt - Search to find developers in your city on Github.