I've used Patternmaker for years and love it. It let's me do everything I would normally do with paper, pencil and scissors on the screen and then print out full sized patterns. I design for theatre and have made custom slopers for entire casts and cut and slashed my way to everything from 1800's dresses to 1950's dior inspired gowns to scaled scenery for scenic designs. You can also use line drawings from period source materials and retrace and scale to size.
I've often spent the evening drafting multiple patterns, take my computer into the shop the next day and everything prints out and I'm ready to go!