Is there a 3D modeler that...

[Sky Ninja]

...can create vertexes locked to a grid? In the way Doom Builder locks to a grid.

 

[I'll Begin]

I wouldn't think so. Why do you need it?

 

[Sky Ninja]

When I try to make 3D models, I need it to lock to a grid. I can't evenly place verticies and my models come out looking horribly uneven.

 

[Sprocket]

My favorite modeling program is Blender. It can do what you want and is completely free. Only thing is, you have to do some weird stuff to convert models to MD2 with it.. I haven't figured it out yet