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.)

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.