@ -337,7 +337,6 @@ _See also: [Comparison of CalDAV and CardDAV implementations - Wikipedia](https:
- [SimpleX Chat](https://github.com/simplex-chat/simplex-chat) - The most private and secure chat and applications platform - now with double ratchet E2E encryption. `AGPL-3.0``Haskell`
- [Soketi](https://soketi.app/) - Soketi is a free, open-source Pusher drop-in alternative. ([Source Code](https://github.com/soketi/soketi)) `MIT``Nodejs`
- [Spectrum 2](https://spectrum.im/) - Spectrum 2 is an open source instant messaging transport. It allows users to chat together even when they are using different IM networks. ([Source Code](https://github.com/SpectrumIM/spectrum2)) `GPL-3.0``C++`
- [Spreed](https://www.spreed.me/) - WebRTC audio/video calls, conferencing server, and web client. ([Source Code](https://github.com/strukturag/spreed-webrtc)) `AGPL-3.0``Go`
- [StoneAge Messenger](https://cweb.gitlab.io/StoneAge.html) - A self-hosted Android messenger, S3-compatible storage is the only backend needed. ([Source Code](https://gitlab.com/cweb-repos/cweb-conversations), [Clients](https://f-droid.org/en/packages/com.cweb.messenger/)) `GPL-3.0``Java`
- [Synapse](https://matrix.org/docs/projects/server/synapse) - Server for [Matrix](https://matrix.org/), an open standard for decentralized persistent communication. ([Source Code](https://github.com/matrix-org/synapse)) `Apache-2.0``Python`
- [Syndie](https://syndie.de) - Syndie is a libre system for operating distributed forums. `CC0-1.0``Java`
KieranRobson
3 years ago