Software cant be written without help. So I have to thank the whole Linux-community for a great OS and all the stuff n tools. "id" did a nice job too, and Carmack is really good at what he is doing. I paid for the game, and thats all they care about ;), but I like them anyway.

Here we go:

Blender, a great renderer for Linux/Windows (free for private/non-commercial use) Blender, written by NaN
SourceForge, hosting developers SourceForge