Poke lets you tweak numerical values in any running Windows app, the most obvious use of which, of course, is to cheat at games. It works like most "trainers," by scanning the memory that your game is using for a value you put in, such as the amount of in-game money or experience you have, and letting you change it to whatever you like. Poke's creators say it doesn't work for multiplayer games but will work for everything else.