Dialog Messenger - handy and feature-rich enterprise multi-device messenger available for server or cloud – Slack-like, but not Slack-limited
Sawia - Find trending open source projects to contribute to
Ripcord - A desktop chat client for Discord and Slack
Swyya - Find trending open source projects to contribute to
Ziggs - Smoothly Share Content Between Devices!
Request for maintainers - Find any OSS project calling for collaborators