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