Blender3D is a nice, free package, with Python Scripts(And looks like Lightwave.)

But, I do'nt want a free Editor so much as I just want to open and save Native Poser formats.

.OBJ is really Alias' format for Maya.  I think it's great that so many applications share it, but my experience is that most do'nt really have every aspect of it cover very well. I'm forever getting a "Wrong number of Vertices" message whenever I try to load an exported V3MT.OBJ back into Poser, as an MT, after I've edited it in any Modeler!  This is mainly because many applications do'nt share the same standard for measure and scale of 3D World Space.  Thus both the size, and position of the .OBJ is getting bounced around a little, I think.  And I'm always hearing of people wondering why bother having the .MTL

So, to start and then end with native Poser files would just be best...