wings 3d

wings3d is a free Subdivision modeler.
It supports the following formats:

* Nendo (NDO)
* 3D Studio (3DS)
* Wavefront (OBJ)
* VRML (WRL)
* Renderware (RWX)
* FBX (on Windows and Mac OS X)
* Yafray
* Toxic

Several tutorials are available on the site as well.