The Leatherman Freestyle Tool has everything you need, and keeps the load weight to a minimum.

Whether you need pliers, a wire-cutter, a combo Philips/Flathead screwdriver, a straight blade or a bottle opener/carabineer, you are sure to find it in this nifty multi-purpose tool appliance. 

The Leatherman Freestyle Tool may be handy, but it kind of reminds me of Edward Scissorhands.