Android Chat SDK ➜ Stream Chat API. UI component libraries for chat
UFONet - Denial of Service Toolkit
'Leet Network is a free chatting client Based on java technologies.
A XMPP client written in java
Chat application using MySQL, PHP and Javascript
Chat Messenger written in Java
Underground IM is a free Java Instant Messaging solution.
Chat application that facilitates chatting between connected computers
Mult-platform chat for LAN. No server required