Awesome GitHub Topics - Top 500 topics on GitHub that's filtered and categorized
GitSpo - Measure & engage your open-source community
git:logs - The definitive list of open source resources on Github
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
Mailbrew - Automated email digests from Twitter, Reddit, YouTube & more
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.