BabelChat: A Java applet/server that supports real-time language translation, making it possible for people who don't speak the same language to hold a conversation [Open Source, Apache License].
Babylon Java Chat: An open source client/server combo for chatting and collaborative whiteboard drawing over the Internet. The client can be imbedded in WWW pages as an applet, or run as a standalone application.
Chat Blazer: A complete chat solution and online helpdesk for businesses online.
Dialogoo: Offers java-applet based chat functionality to a website for free, and without banners.
DigiChat: Commercial Java-based software package that runs on any compatible operating system. Available in hosting and license packages.
Java Chat: Added service with the DreamTime system.
NetDIVE SiteSticky: Web based java chat and community building software with many customizeable features. User friendly and firewall proof.
NetDive WeMessage: Instant messaging system based on client/server, peer-to-peer, and distributed architecture written in Java.
okCHAT: Real-time chat program.
ParaChat: Offers hosted Java chat services, and chat server software.
Raidersoft: Offer a customisable java based chatroom solution, a java instant messaging tool, messageboard software and an online customer support solution.
RealChat Software: A commercial website chat solution. The package includes client and server software. Free evaluation available.
SPiN Chat System 2.3: java client and server
Volano LLC: Client and server Java software for providing chat at your Web site or for running your own world wide chat network.