Mumble is an open-source, low-latency, high quality voice chat
Chat Messenger. E-Mail-Client. Websearch. Filetransfer.
A place for all your chatting apps.
A lightweight framework to build chat applications, made in Swift
WeLive5 is an online customer service system, online support
WeLive is an online customer service system, online support
An example of a simple chat system
Just another LAN messenger
Java app for local peer-to-peer communication
A Mod of DC++ Client Based on FreeDC++.
Secure chat and conferencing protocol
WorkieTalkie - NetBeans Jabber plug-in and application