Second Life - Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
VRChat - Create and play in virtual worlds with others
The Legend of Pirates Online - Pirates of the Caribbean Online is an Action MMORPG, Exploration, Virtual-World, and Exploration Simulation developed and published by Disney Online.
Spatial - Collaborate from anywhere in AR
IMVU - IMVU is multiplayer online video game created by ‘IMVU Inc’.
ActiveWorlds - Activeworlds hosts a Universe of over 500 3D virtual reality worlds.