AwesomeDigest - An email newsletter for every "awesome" list on GitHub 😻
GitSpo - Measure & engage your open-source community
DevScreen - Automated, practical interview assessments for developers
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
git:logs - The definitive list of open source resources on Github
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.