Wikia

See the tools page for game engines, software libraries, and programs for creating 3D models, animation, textures, sounds, music and so forth.

Repositories Edit

OpenGameArt : Repository full of user-uploaded freely licensed game art assets
Free Game Arts open source game resources
http://telias.free.fr/index.html free the models, content free for every use
http://www.katorlegaz.com/3d_models/ Katorlegaz blender models, licensed under Creative Commons Attribution 3.0 United States
http://openclipart.org/ public domain svgs
http://rltiles.sourceforge.net/ 2d tilesets for roguelike games, only attribution required
http://www.worldforge.org/ WorldForge, GPL-GFDL double license, has a media repository
http://www.e2-productions.com/bmr the new blender model repository (blenderartists thread)
http://repository.parastudios.de/ Blender materials (public domain) (blenderartists thread)

http://www.alientrap.org/nexuiz/ Nexuiz Multiplayer FPS, game data and source are GPL
http://tremulous.net/ Tremulous, source code under GPL, game data under Creative Commons Attribution-ShareAlike License version 2.5
http://boson.eu.org/ Boson, most of the game data is free content
http://torcs.sourceforge.net/ Torcs, game data partly under Free Art License and partly non free
http://hack-and-slash.sf.net Hack and Slash - Action RPG (LGPL)

http://openarena.ws/ OpenArena, GPL data replacement for Quake III Arena
http://openquartz.sourceforge.net/ Open Quartz, GPL data replacement for Quake
http://freedoom.sourceforge.net/ FreeDoom, modified BSD (compatible with GPL) data replacement for Doom