More possibilities for making 3D games if you can make your own models, even simple ones.
Game programmers must understand 3D modeling terminology and data structures to be able to load and use 3D models.
GNU General Public Licence
Windows 2000, XP, Vista
Mac OS X (PPC and Intel)
FreeBSD 5.4 (i386)
SGI Irix 6.5
Sun Solaris 2.8 (sparc)
There are a lot of them, and that can make it difficult to find up-to-date information.
Note that the change from 2.49 to 2.5 is a big change.
BlenderWiki The Blender wiki has links to tutorials, the user's manual, a quick start guide and other documentation.
The Blender documentation download/links page
The Blender manual
Blender 3D: Noob to Pro (a Wikibook)
You can import .blend files directly, or export from Blender to .fbx
FBX export allows you to only export selected object.
You MUST do UV-mapping in Blender if you want textures to show up in Unity.