JETFIREDX  Wings is a great modeler that I have been using for years now. Don't let the UI put you off. Similar to Blender, tt is fully cross platform which is why it doesn't fit in to any OS. Unlike Blender, Wings' method of editing meshes doesn't take years to learn and years more to master. After learning the basics, enabling advanced options in the menus, and learning a few...repeat FEW hotkeys, I was off an running. Also, unlike Blender, all of Wings' buttons and windows work like any user would expect.

There are some great plugins that the community around Wings has created and the forums are great to post questions in.

A few notes: Wings doesn't do animation. A bummer, I know because I think its UI would be well suited to this task. Also, if you get a blank window with a title bar when you open it, just drag the window a small amount and it will refresh. (A small bug that seems to have crept in through recent builds.)  
(Version 0.99.03)

JEFF LERCH  I do some programming in VRML and this program is tops for getting down some quick geometry to work with. However I do have to warn that it tends to leave around some extra geometry in it's wake. Not the cleanest but definetly the quickest. Now how about a duel binary?  
(Version 0.98.26)

EVA  I have used Wings 3D for some months, together with Poser. It's the best non-commercial 3D-program I have come across. You can create good models from scratch or work with imported ones. The program is stabele and the documentation very good.  
(Version 0.98.26)

NIN  i'm an architecture student and i'm just so happy to come across Wings 3D.. its free, easy to use, well documented, has great tutorial and works as well as other 3D program.. cheers to the developer and keep up the good work!  
(Version 0.98.26)

ANONYMOUS  I've been using this software on and off for a little while now and I have to say it is great that such a powerful program is free.

Keep up the great work!  
(Version 0.98.20c)