Free GM Resource: Paper Minis by Ze Bulette
Ze Bulette, from the Dungeons and Digressions blog likes to make paper minis. He seems to be on a bit of a hiatus, but I'm sure he'll be back to making posts and minis when the time is right.
One thing I particularly like about his various minis is that he likes to include the base as part of the figure. With careful cutting and folding you don't require a special holder to keep these figures upright.