GitHub + Slack Integration - Full visibility into your GitHub projects right inside Slack
GitSpo - Measure & engage your open-source community
GitCommands - An interactive reference tool for Git commands
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
ask-stack - Get answers from Stack Overflow directly in the Atom editor
Ruby Toolbox - Explore and compare open source Ruby libraries