GitHub + Slack Integration - Full visibility into your GitHub projects right inside Slack
GitSpo - Measure & engage your open-source community
Cryotos - #1 Maintenance Management Software
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
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.