Repository for miscellaneous repository management and discussions: https://github.com/revoltchat/revolt/discussions
The Secure CommsOS™ for mission-critical operations
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Jitsi Meet - Secure, Simple and Scalable Video Conferences that you use as a standalone app or embed in your web application.
Zulip server and web application. Open-source team chat that helps teams stay productive and focused.
A glossy Matrix collaboration client for the web.
Mumble is an open-source, low-latency, high quality voice chat software.