Cyberix3D - Free online 3D Game Maker. Make your own 3D games online!
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.
Castle Game Engine - An open-source 3D/2D game engine for ObjectPascal.
Habbo - Hobbo is also known as ‘Hobbo Hotel’.
Open 3D Engine - Open 3D Engine is an open-source 3D game development engine in real-time.
IMVU - IMVU is multiplayer online video game created by ‘IMVU Inc’.