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)   WinHide 1.0
Quickly hide your working programs and windows. The hidden programs are not displayed in the Taskbar, in Ctrl-Alt-Del list or in task manager.

 3)   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.

 4)   Windows Hider Pro 1.51
Windows Hider will allow you to hide specified groups of windows just by pressing a single Hotkey (or a combination of Hotkeys). Most of the time, program works in the hidden mode, not making anyone know that it is there.

 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!