Leatherman Micra (on my keys)
Spyderco Endura SS (a gift from my father)
Spyderco Rescue old and orange (the first knife I ever abused)
Benchmade 350 Mel Pardue (my first quality one-handed folder)
Cold Steel 4" Tanto Voyager (in my pocket at the moment)
Victorinox (traveler, torist or something like that?)
Smith and Wesson S.W.A.T. (one of the best bang for $$ knives)
Leatherman Supertool (it just keeps going)

so to answer the question any one or more of those knives above