Anim8or!

http://www.anim8or.com/

I found this a few years ago and installed it on my dad's computer. Since then, I've forgot about it, but now I rediscovered it. Its a really neat free 3D graphics program. Though not quite as powerful as the $120,000 software of the day, its good for beginners. It has various tutorials and pictures from people who've made some KICK BUTT stuff.

The program download is about 900kb, and the PDF manual is 1 meg. I don't know what kind of system resources it needs, but I don't think its much.

Worth poking around with. ... maybe we can get some more Zoids renderers!

Many people I know prefer http://www.wings3d.org :)
It's free too.

Personally I can't stand many of the cheap products, except maybe Milkshape3D. Still unless you need it for some real exporting means,
Softimage Mod Tool (XSI | Experience 4.2) / Maya Personal Learning Edition / GMax are very good.