[lutherus]

AutoCAD alternativa :

BrisCAD - http://www.bricsys.com/en_INTL/
solidan programčić i nije pretjerano skup a najbolje ima i Linux client

DraftSight - http://www.3ds.com/products/draftsight/overview/
odličan alat, no nažalost (ili na sreću :P ) samo za 2d modeliranje, nema 3d

Corel alternative :

Inkscape - http://inkscape.org/