The first messaging platform operating without user identifiers
A New Kind of Instant Messaging
Powerful open source team chat application
The Leading Open Source Communication Hub | Community Version
Home to the Signal Protocol and other cryptographic primitives
Mumble is an open-source, low-latency, high quality voice chat
Chat Messenger. E-Mail-Client. Websearch. Filetransfer.
You can message and share files inside your intranet without a server.
A universal instant messaging (IM) program
Development toolkit for Web Services and XML data bindings for C & C++
bluetooth mesh chat, IRC vibes
minimalistic, secure and autonomous P2P messenger
A GNU/Linux operating system accessible for visually impaired.
Your own private chat server. No coding. Ready in minutes.
PHP driven chat forum
Smoke: Android Crypto Chat Messenger
Configurable ident daemon with IP masquerading support
The Free & Popular FLARUM Web Software in a Complete Virtual Machine
Open-source XMPP client for Android
MSN compatible messenger application
An OpenSource Chat Solution
[WARNING] Project has moved to http://github.com/Retroshare/Retroshare
Client-server networking library