1. 3D GameStudio, Realtime 3D Authoring System, Conitec Datasystems, Inc. http://www.3dgamestudio.com, 2006
2. Alice v2.0, Learn to Program Interactive 3D Graphics, Carnegie Mellon. http://www.alice.org, 2006
3. Anark Gameface, Anark Corporation. http://www.anark.com/entertainment/gameface-features.html, 2006
4. Bethesda Softworks, http://www.elderscrolls.com/games/oblivion_overview.htm, 2006
5. BioWare Corp, http://www.bioware.com, 2006