Browse free open source Chat software and projects below. Use the toggles on the left to filter open source Chat software by OS, license, language, programming language, and project status.
You can message and share files inside your intranet without a server.
A Windows client for the Direct Connect networks
A universal instant messaging (IM) program
An alternative Discord client with voice support made with C++ and GTK
ArmCord is a custom client designed to enhance your Discord experience
An intranet chat application that does not require a server.
Development toolkit for Web Services and XML data bindings for C & C++
Psi IM — Qt-based XMPP client
Psi+ Project — development branch of Psi XMPP client
A patched version of discord, with bot login support
Telegram Desktop messaging app
Mattermost Desktop application for Windows, Mac and Linux
The FetLife App on Android
A free peer-to-peer (P2P) BitTorrent file sharing client
A smaller, faster, and easier IM client
A hex editor for WeChat/QQ/TIM
The first messaging platform operating without user identifiers
The pinnacle of file-sharing and chat - an innovative DC client!
Elegant Facebook Messenger desktop app
Take control of your Discord experience with GoofCord
VICIdial Contact Center Suite
Mumble is an open-source, low-latency, high quality voice chat
Low-latency, high quality voice chat for gamers
The game engine for everyone
A private messenger for iOS