[OFFER] Blitz3D v1.66 + 1.83 update [Windows] (2001-2003)
This is an old version of the Blitz3D, a programming language and IDE for 3D game development (Wikipedia). Today Blitz3D is open source (latest version), but older releases are not available for download. Blitz3D on a compatible machine is a fun way to learn 3D graphics. I think the programming language is more powerful and carefully designed that its direct competitor at the time, DarkBasic, and the development environment is much nicer.
Here is a Blitz3D showreel from 2008.