Hide-XP

From Totalidea Software:

Hide-XP hides any application from your computer screen, just by using one hotkey combination, or even by using the Hide-XP mouse-right-double-click feature. In a matter of milliseconds you can hide what you want to hide, and nobody will even notice that you are currently running several applications on your machine, as they are just invisible once Hide-XP was in action.

You get all your sensitive material off the computer screen without having to close a single application � you just hide them, and nobody will notice what you were doing on your computer.