| 3D Chat Virtual Universe | | People can meet, interact with each other, build houses and whole worlds within a three-dimensional space. |
| 3D Planets | | A 3D virtual reality community. Visitors can chat, play games, hold community jobs, own homes, and buy objects. |
| 3D-4u2 multi-user VR solutions | | 3D-4u2 offers multiuser 3D and virtual reality technology on the internet that seemlessly integrates most current technologies, ranging from live video to 3D animations and allows users to build themselves. |
| Activeworlds | | 3D virtual reality chat plugin software and servers. Design worlds, chat with friends, play games. |
| Alterlinks | | Active Worlds resource for visiting or creating your own virtual world: hosting, textures, 3D objects, avatars, skyboxes, tutorials. |
| Atmosphere Work | | Jim Coe's training and resources for world builders. Tutorials with 3D demos and JavaScripts for Adobe Atmosphere Lighting, and audio. |
| AtmoWire | | Adobe Atmosphere tutorials, resources, directory, reviews, and news. |
| AW Europe | | An official distributor of Activeworlds technology in Europe with 3D environments for both business and home use. |
| Cage8 | | A "Top 100" list for Adobe Atmosphere virtual worlds and websites, based on click-through rates. |
| Chicago3D.Net | | A hosting reseller for Activeworlds, Inc. since 1998. |
| Contact Consortium | | A research and trade association for virtual worlds, avatars, virtual community. Organizer of yearly Avatars conference. |
| Cybertown | | A popular and long-running web-based multiuser world, using VRML and Blaxxun browser software. Chat, and use objects. |
| Dive | | An Internet-based distributed multi-user VR system, developed by researchers at the Swedish Institute of Computer Science since 1991. |
| Dreamland Park | | Explore, chat, and build a community using Active Worlds software. |
| Moove | | 3D chat world. Customizable avatars with facial expression. Users can chat, build and furnish a house, listen to music, share files. Can be integrated with external tools. |
| OzGate | | A site running several DigitalSpace Traveler worlds. |
| Planet Virtuel | | 3D VR community with avatar based chat. Design and create your own home and surroundings. |
| Second Life | | An online society within a 3D world where you can explore, build, socialize, and participate in their own economy. |
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