Most of the hunters around here don't go into the woods without one of those dryer sheets tucked under their hats, protecting their necks. I know people who say that this works, but one needs to start drinking it a couple weeks before one needs the repellant effect. I've encouraged my kids to drink it at and before Pennsic on that basis. I've never done any controlled experiments, though, so am not sure it works. I prefer teh peppermint, as smelling like a cough drop is not my favorite thing.
Borage is a skeeter repellent.