Hide or Show easily all your desktop gadgets, with Gadgibility
Gadgibility (from Gadgets and Visibility) is a light and free program you can use whenever you need to make all of your desktop gadgets disappear instantly.
Right click the icon of Gadgibility at the system tray and select the “Gadgibility” option, or use a shortcut key you can define (the default one is Win+Alt+G).
Hiding your Gadgets with Gadgibility will keep their settings — it is not the same as “closing” the gadgets. They may not show up on the Desktop, but their configuration remains intact. Note that when you restart Windows your gadgets are always revealed.
Gadgibility is a great working freeware, that you will appreciate very much if you need to hide your gadgets often, in order to test or enjoy wallpapers, hide information from visitors, etc.
You can use Gadgibility also to restart your gadgets easily whenever some of them fail to start properly.
The program is absolutely safe and free from viruses, but it seems to work only on Windows Vista, 7 and 8.