Has anyone here ever heard of Blender? It's an open-source 3d software that you can download at blender.org. It's pretty complicated, but

HOLY SHIT!!! WATCH OUT!!

...sorry. My little brother was hurling knives at me.

Anyway, once you get the hang of it, it's fun to use and you can make great 3d models. I've used it for about 2 years now, but could still use some tips. If you use it and know some useful stuff, please comment. Otherwise, if you're interested in 3d modeling, I recommend that you go there and download it. If you search around the website a little, you can find a wikipedia documentation on it.

Don't forget to bother my older brother, OneEyedSamurai