Mousotron Pro keeps track of the distance your mouse cursor moves and also the number of times you pressed the mouse buttons. On top of that it shows the number of keystrokes. If your boss says you don't work hard enough, this is the tool to prove him wrong.
Mousotron is basically just fun, but it can also be a very handy tool in RSI prevention (Repetitive Strain Injury) or the rehabilitation of it.
Now supports all major languages.