Submitted by Brizmo
Gotta talk about the Spyderco SpydeRench T01. Expensive as hell, but all the tools are actually usable: lockback knife, crescent wrench, pliers and real screwdriver bits that lock in to a full size handle. All folds to the size of a flip cell phone.
ED -- Taken from Spyderco's website, the T01 has the following features.