cobalt?
jop, it is the coolest industrial design tool out there (my opinion).
there are also the alias studio tools and rhinoceros (wich is considered as the little brother from cobalt)
the pro:
it is veeeeery veery quick... compared with autocad.. muhahaha
it works precise (maaaany snapping options like tangential ecc)
the exchange between graphical work and numerical drawing is very quick (at the bottom you can adjust the most important values in realtime instead of using edit windows all the time.
cons:
expensive (but you don't have to buy it
do following:
go to the official site and download the video tutorials, they are really good.
greetings