NO, I'm not advertising
Found this link the other day. This a 3D graphics package I used ot use years ago in college. It sold for about $600 but now it's a free download!
Caligari trueSpace 3
It's no 3D Studio Max or anything, but it's pretty darn good and has a much lower learning curve than many packages. It requires you use Iomega's Active Disk thingy, but that's not bad for free software right?!?