Dialog Messenger - handy and feature-rich enterprise multi-device messenger available for server or cloud – Slack-like, but not Slack-limited
Gitscout - A beautiful Github Issues experience for macOS
Ripcord - A desktop chat client for Discord and Slack
Shrink for Github - A macOS app for your Github issues
Ziggs - Smoothly Share Content Between Devices!
VarCI - The missing assistant For GitHub issues