I would highly recommend moi3D.com. Its ‘only’ a NURBS modeler but I’ve successfully used from initial concept design all the way to DFM. Its user interface i

I would highly recommend moi3D.com. Its ‘only’ a NURBS modeler but I’ve successfully used from initial concept design all the way to DFM. Its user interface is extremely well thought out and its written by Michael Gibson who is also the original developer of Rhino3D.