Big file to download. Vision 3d I couldn't find an url for it, but I'm pretty sure it's on the net somewhere. This programs is basically one step below a pretty good commercial program. Interface is more or less standard. Modeling is good but not flexible.
Animation is basic.
Rendering is okay. The first program I found that output to 3DMF files. 2D image software is usually a bit more intuitive, and usually less expensive. There has already been a lot of discussion on this already and a ton of programs in comparison to the numbers available for 3d work, so I'll keep the list as short as I can. The Photoshop interface is based on the original cool app, MacPaint, but is a zillion times better.