VICIdial Contact Center Suite
A lightweight, high-performance Internet Relay Chat server
Standalone chat system developed in php, mysql and javascript
Development toolkit for Web Services and XML data bindings for C & C++
WeLive5 is an online customer service system, online support
Simple open source php based HTML5 rich web chat system
Client-server networking library
Moved to http://www.fuzzball.org
Web based SMS Chat app delivering messages through SMS Gateways
free chat system
IRC client
Secure chat and conferencing protocol
Update XMPP Status from Google Latitude Location
yarkant.tk
MSN/Live Messenger chat client for Linux.