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.
Gource - Gource is a software version control visualization tool.
Ruby Toolbox - Explore and compare open source Ruby libraries
Programming Languages Influence Network - Visualizing influence relations of programming languages