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.
Unity - The multiplatform game creation tools for everyone.
ActiveWorlds - Activeworlds hosts a Universe of over 500 3D virtual reality worlds.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Habbo - Hobbo is also known as ‘Hobbo Hotel’.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.