GitSpo - Measure & engage your open-source community
GitHub Visualizer - Enter user/repo and see the project visually
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
The GitHub Matrix Screensaver - Latest commits from GitHub visualized Matrix-style
LibHunt - LibHunt tracks mentions of software libraries on relevant social networks. Based on that data, you can find the most popular projects and their alternatives.
Github Profile Visualizer - Tool for visualizing GitHub profiles