Hi Mosca,
I also use anim8or. And I beleive Den, another Admin here, uses it too. I find it good for most projects but always render in another program.
I also use Autocad 2002 for my job and do some 3D work there, but it's export filters are limited and often import poorly to other programs. I have used 3D Studio Max in the past, but not for some time and no longer have access to it.
There are a few other free modelers around that are supposed to be quite good. One I hear a lot about is Wings. Its from Japan and has a good following on line. I have installed it, but never had time to try to learn it. There are some tutorials on the site.
http://www.wings3d.com/
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