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.
Roblox - Reimagining the way people come together.
Vircadia - Vircadia is an open-source and decentralized real-time VR creation platform for university, enterprise, social, and OpenSim users.
KoGaMa - Kogama is a Massively Multiplayer Online, Sandbox, City-Building and Adventure-based video game.
VRChat - Create and play in virtual worlds with others
Brick Hill - Brick Hill is the ultimate building block game, allowing you to push the limits of digital bricks and make your own games.