telco industry uses friction tape to wrap on the ends of cables before pullling them in underground conduit, or around fiber optic lines for ariel innerduct. cant remember what brand it is, probably not something popular..
what ive used before on wooden hammer handles, and some other things - is electrical tape. wrap a smooth layer from the bottom of the handle as high up as you would like, then without cutting the tape - unwind a 2' or 3' piece, and still without cutting it - spin the roll of tape repeatedly - to twist the lenght you pulled out into a round "thread or rope" for lack of better word.. then wrap that around the handle from the top down, to give you a spiral "grip" down the handle. then repeat - opposite direction from bottom up to give you a "diamond pattern" - and then cover all that with a second layer of smooth tape.. the result will look and feel like as if you wrapped string around the handle and covered it with tape... it will give you a very nice non-slip grip.
i have dont this on wooden line hammer handles, and a screwdriver or two the dog chewed up at home.. it really works pretty good and is a fast and simple method you can always remove.