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 universal instant messaging (IM) program
A Windows client for the Direct Connect networks
The FetLife App on Android
An intranet chat application that does not require a server.
Development toolkit for Web Services and XML data bindings for C & C++
Psi+ Project — development branch of Psi XMPP client
Psi IM — Qt-based XMPP client
A smaller, faster, and easier IM client
A free peer-to-peer (P2P) BitTorrent file sharing client
Low-latency, high quality voice chat for gamers
The Leading Open Source Communication Hub | Community Version
The pinnacle of file-sharing and chat - an innovative DC client!
Standalone chat system developed in php, mysql and javascript
An alternative Discord client with voice support made with C++ and GTK
ArmCord is a custom client designed to enhance your Discord experience
Mattermost Desktop application for Windows, Mac and Linux
A patched version of discord, with bot login support
Dark Mode tốt nhất cho Zalo
A New Kind of Instant Messaging
An instant messaging client for XMPP networks
A private messenger for iOS
Elegant Facebook Messenger desktop app