Whether or not pinup is your thing, free patterns are always awesome. Being a fan of things that don't dent my college budget I scour the internet for patterns of the free variety. Here's what I have found do far. I haven't made all of these, but they are all on my to do list.
Crinoline from Gertie's New Blog for Better Sewing
Make your own garter belt
Skirts and dresses:
Scalloped Hem Skirt
Kasia Pencil Skirt
50's style dress
Marilyn-esque convertible dress
Pants and Blouses:
Ruby Sailor Shorts
Burda Style Blouse with Ruffled Collar
And finally this super cute Apron:
Vintage Apron Pattern
Hope something inspires you to do some sewing!