I use the Pedro's ICU multi-tool. 2mm-8mm hex wreches, phillips/flat-head screwdriver, chain tool, T-25 torque wrench, spoke wrench for normal nipples, spoke wrench for Ksyriums, and 2 tire levers attach to the side of it. Surprisingly small too (Edit: Unlike this picture. Sorry bout that).
Mod removed pic, just too large, please reduce size before reposting