You might try ac3d from http://www.comp.lancs.ac.uk/computing/users/andy/ac3d.html (its time-unlimited shareware and has all basic features plus easy-to-use user interface) or perhaps ppmodeler from http://webplaza.pt.lu/public/saunier/ppmodeler.html ( freeware, advanced features, multi-platform, but somewhat nasty user interface ) Happy modelling !