- Mastodon - Twitter like
- Plemora - Twitter like compatiple with Mastodon
- Matrix - Nachrichten Dienst wie Signal oder Telegram
- Jamroom - Social Network
- Lemmy - Reddit like
- Convos - client for connecting IRC
- Rocket Chat
- Twake - Microsoft Teams alternative
- Fonos - oss twilio alternative - communications Stack: voice, video, messaging for business networks
- Sherlock - Hunt social media accounts by username