1)   OneClick Quick Hide Window 1.8
OneClick Hide Window helps you to hide all active program window immediately by click left&right mouse buttons. You can hide the browser windows, folder windows, applications windows, all windows in a flash time. Hide window by oneclick now!

 2)   WinBoss 1.2
WinBoss is a system tray application that hide (all) running programs with one keyboard hit. Useful when Boss is coming, or to hide less important application from cluttering the desktop.

 3)   ALTZ 1.0
ALTZ gives you control over your open windows to quickly hide and stay on top of thiaimngs.