1)   Hide Window Plus 2.0
Hide Window Plus lets you instantly hide any running programwith a hotkey or right mouse click on the Close button. Plus this utility allows you to quickly run a screensaver, turn off monitor or mute sound using hotkeys. Runs hidden in background.

 2)   Hide Window Hotkey 2.5
Hide applications window or close them completely through Mouse Hotkey or Keyboard Hotkey.Resize your programs automatically,such as maximize,minimize,normal,minimize to tray.Set specific windows transparency and arrange the windows on taskbar.

 3)   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.

 4)   Taskbar Hide - hide windows program 1.28
Hide windows program (hide applications)completely through a hotkey or as an icon in system tray.Hide some less used icons from tray.Arrange the windows on taskbar based on your choice.Automatically maximize all new windows or only new IE windows.

 5)   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!

 6)   TweakWindow 1.5
TweakWindow is a handy window enhancement utility with a wealth of options. You can set your own transparency options, hide, minimize, roll up, place window on top of all others, ghost it or even change a window's icon/title. Try it FREE now!