Metric is the mainline for the JK, as are Torx- T27, T30, T40, T45, T50 being your main players. Maybe a T20 as well.
Otherwise, I have to agree with daggo. However, if you're looking to learn, there are some great ways to do so with the JK! May I HIGHLY recommend the Mopar mirror relocation kit? It provides a bracket and new mirror for the driver's side when the doors are off, keeping you legal. Easy installation- all you need is 10 minutes, and a T40 Torx bit.
Another good one is replacing the OEM steering damper. A few metric sockets (depends on which replacement damper you buy), and a few minutes, and a decent improvement, as well as reduced wear and tear on your front end (steering and axle)- Mark W.