Models & Meshes (legacy)
There are a number of Quake 3 specific MD3 models as well as a number of more generic ASE format models; these can be used in any game or product supporting the format, including Doom 3 and other powered games.
Don’t forget, additional models and media can be found in various custom levels and maps in the Maps & Levels section of the site.
Models are available for free but strictly for non-commercial use only. For more details click here.