Open Source Chat Servers in Java

Open-source Yahoo Messenger API implementation for Java; fork of jYMSG; build a Yahoo client with minimal setup.

Real-time chat zone for websites with IRC-like commands, hierarchy levels, and a simple config file; Java applet client, lightweight C server.

Web chat application in Java for Tomcat; applet client with smooth updates via server connection; emoticons, keywords, and admin functions.

Web-based Jabber/XMPP instant messaging client; tested with Google Talk; AJAX UI; supports corporate chat and gateway to MSN, ICQ, AOL, Yahoo.

Free Java WebChat server: customizable layout, pluggable SQL or no-auth, authorization framework, NIO-based networking; no applets required.

Java library for MSN Messenger (MSNP8–MSNP15); multi-user oriented and intended to be easy to integrate and use.

Open-source web chat server and client in Java; secure connections, emoticons, and admin roles.

Java-based HTTP/HTML chat server with integrated standalone HTTP server; browser-only clients, no applets.

Live-help collaboration tool: website visitors click to chat with company reps in real time; reps can monitor and initiate dialogs; for Linux and Windows.