ParaChat  
   Offers hosted Java chat services, and chat server software.
   http://www.parachat.com/

SPiN Chat System 2.3  
   java client and server
   http://chat.spin.de/

DigiChat  
   Commercial Java-based software package that runs on any compatible operating system. Available in hosting and license packages.
   http://www.digichat.com/

Volano LLC  
   Client and server Java software for providing chat at your Web site or for running your own world wide chat network.
   http://www.volano.com/

Dialogoo  
   Offers java-applet based chat functionality to a website for free, and without banners.
   http://www.dialogoo.com

Chat Blazer  
   A complete chat solution and online helpdesk for businesses online.
   http://www.chatblazer.com/

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].
   http://www.babelchat.com/

Java Chat  
   Added service with the DreamTime system.
   http://www.dreamtime.net

NetDIVE SiteSticky  
   Web based java chat and community building software with many customizeable features. User friendly and firewall proof.
   http://www.sitesticky.com

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.
   http://visopsys.org/andy/babylon/

Raidersoft  
   Commercial customizable real time java chat solutions.
   http://freechat.raidersoft.com/

okCHAT  
   Real-time chat program.
   http://www.okchat.com/

RealChat Software  
   A commercial website chat solution. The package includes client and server software. Free evaluation available.
   http://www.realchat.com/

NetDive WeMessage  
   Instant messaging system based on client/server, peer-to-peer, and distributed architecture written in Java.
   http://www.netdive.com/

Internet Chat Systems, Inc.  
   WWW, IRC and Telnet chat interfaces. IRC through java enabled browsers. Free service for adding chat rooms to websites.
   http://www.chatsystems.com/