Git Random - Chrome extension to replace new tab with random github user
GitSpo - Measure & engage your open-source community
Code Climate for Google Chrome - Code quality and test coverage, directly in GitHub
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
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.
Cryotos - #1 Maintenance Management Software