Active Worlds Browser - 2.1 build 295 

Active Worlds Browser is real-time chat software that can be used from the World Wide Web. It has a 3D-type interface where everyone adopts an avatar, and, unlike using chat rooms, you point-and-click to walk closer to different groups. There are many "worlds" available where you can go to chat with different people.

ChatPOP - 0.15 beta 

ChatPOP is no ordinary chatting program. It takes chatting to your friends to a new level by incorporating 3D graphic rooms! You choose a body (avatar)and are transported into a virtual room full of other people. Be physically in another world while you chat!

Gooey - beta 1.0 

Gooey enables real-time communication between web surfers who visit the same internet sites, simultaneously. Features include updated list of all online users on any website visited, private chats, games, and much more.

Holodesk Communicator - 1.0 

The Holodesk Telepresence Network allows people all over the world to join together in a 3D virtual environment to voice chat, text chat, share documents, view pictures, play games, or do business. The Holodesk Communicator is your key to the Holodesk Telepresence Network. It combines internet phone, virtual reality and document sharing all in one multi-dimensional software package.

Outer Worlds - 2.1 build 291 

Outer Worlds is a browser for three-dimensional virtual-reality worlds. Meet and chat with your friends in real-time 3D. Outer Worlds is easy to install; simply place and go.

PalTalk - 1.4.1 

PalTalk is an awesome text and voice chat program. Talk to your friends and hear them in real-time! You can define your friends lists and PalTalk shows you when your friends are online. Join chat groups to make new friends or even send messages to your friends while they're offline!

Teamwave Workplace - 4.3b1 beta 

Much more than just a chat room, Teamwave Workplace allows groups working on a project in different areas, floors, cities or even countries to stay in touch during the lifespan of a project. Features include virtual rooms, concept maps, bulletin boards, calendars, databases, real-time chat, whiteboard, and more. Communicating with the members of your project team has never been easier!

Visual Rendezvous - 2.6 

Visual Rendezvous uses critical groupware technologies like whiteboards, shared documents, persistent information, text communications and collective browsing. It allows customers and colleagues to work in real-time, and it is platform independent.