Stardock Fences is a program that helps you organize your desktop and can hide your icons when they are not in use. You can clean and organise your desktop by creating shaded areas which become movable and sizable containers for your icons. Double click blank spaces on your desktop and all your fences will fade out, and back. Fences is an add-on to your desktop, not a replacement. It is free for personal use.

Download it from: http://www.stardock.com