Free polygonal-based modeling tool

Is there a free (or student version) polygonal-based modeling tool out there (e.g. MultiGen Creator, Discreet 3D Studio Max, etc.)?

My desire is to use raw OpenGL and OSG – depending upon the issue I’m trying to look at.

You can look for Ayam (dont know the project page) wich is a LGPL application.
otherwise Blender is special but interesting.