Topeak Alien multi-tool. This is my favorite little tool for my rides. Has everything you might need. The current generation retails for $93. Includes:
• Allen/hex wrenches (including common sizes like 2.5mm through 6mm, plus 8mm and 10mm options)
• Box wrenches (8mm, 9mm, 10mm 12-point)
• Spoke wrenches (14g and 15g)
• Integrated chain tool and chain hook
• Phillips and flathead screwdrivers
• Serrated knife and bottle/can opener
• Two integrated plastic/hardened tire levers