There are many models and options available for a Swiss Army penknife, so what would you choose besides a blade? I would choose can opener, phillips screwdriver and flat blade screwdriver.
I have tweezers, scissors, saw, toothpick as well as both screwdrivers and a couple of blades. I think it's the camper/woodsman model by victorinox. Oh, don't leave out the corkscrew!