The first messaging platform operating without user identifiers
The Leading Open Source Communication Hub | Community Version
A glossy Matrix collaboration client for the web
Mumble is an open-source, low-latency, high quality voice chat
Private messenger for Windows, Mac, and Linux
Video- & audio-conferencing app for Nextcloud
Franz is a free messaging app for services like WhatsApp, Slack, etc,
A minimalist Discord Client
Android Chat SDK ➜ Stream Chat API. UI component libraries for chat
A free (libre) open source, mobile OS for Ethereum
Desktop application for Instagram DMs
Free and Open Source messaging and emailing app
Tool for building chat bots, apps and custom integrations
Development toolkit for Web Services and XML data bindings for C & C++
PLEKv2: predicting lncRNAs and mRNAs
Modern, AI-Smart, WASTE p2p for ipv4, Tor and i2p + Voice Conference.
Smoke: Android Crypto Chat Messenger
The Free & Popular FLARUM Web Software in a Complete Virtual Machine
Every person its messages, whats app like on premise solution
Manage your (Linux) Eggdrop bot with these tools
Suite of utilities to make running Anope IRC services on Linux easier
A Gtk3 Discord client in Golang
Internet Discussion Boards is a message board system by Game Maker 2k.