Playing a game, but don't have dice handy?
Pocket Dice Roller is an analogue, wallet-size (pocketmod) booklet that emulates d6 rolls (d10, d12, and d20 in a pinch).
This is not a random number generator, but an "unexpected" number generator; statistically, this does not match the randomness of an actual die roll, but it's a good replacement when you have no dice or when dice would be inconvenient. Download it, fold it up, and keep it in your wallet!
Buy now from Drive Thru RPG