I recently picked up a little portable USB gamepad for my laptop. It didn't come with any software, but naturally Windows recognizes it just fine. This is great for software that uses gamepads, but what I'm looking for is an application that will allow me to map button presses to keyboard commands for use in other apps and games that don't use gamepads (Warcraft 3 at the moment).

Warcraft 3 doesn't allow you to remap keys itself? Odd.