You can choose one or more corners ("Hotspots") of your desktop, any mouse button, or both, to activate Windows Flip 3D. Once activated, you can use the mouse to select a window.
System Requirements: Windows Vista or Windows 7 with Windows Aero Enabled.
(Does not include Home Basic or Starter editions). The program is tiny (779Kb) and required about 800k of RAM when running.
Download The Windows Vista Flip 3D Activator.