With just a few keystrokes you can perform so many works, such as quick-launch applications, documents and URLs, emulate keys input, emulate wheel-mouse, turn off the monitor, close CD tray, tune output volume, lock computer, make a window always on top...
UltraKeyboard also has a useful tool called KeySpy, which is used to track all the events of keyboard.

UltraKeyboard lets you invent new function to your keyboard