SD WinHider
SD WinHider is the utility to quickly hide/restore your windows, as well as hide and restore system tray icons. Make your desktop space free for more programs! Features: * Hides/restores any window on your desktop; * Hides/restores system tray icons (like ICQ, AOL etc. ... You may use Alt+Up/Down arrows to show/hide application window; * Fast window hide (by pressing both left and right mouse buttons on window); you can turn this off in setup; * Can start with windows; * You can show/hide windows/icons just by 'turning on/off' them in interface; * You can activate manus for icons just by...
http://www2.sysdevsoftware.com/download/winhider.exe - 406Kb - Download - Screenshot

Hide Window Hotkey
Hide Window Hotkey is a utility which allows you to hide the windows, and programs which are running on your screen. It will instantly hide or close all (or some) programs on your screen through Mouse Hotkey or Keyboard Hotkey in order to prevent uninvited persons from seeing them. ... It also could hide taskbar and hide desktop icons. ... Hide Window Hotkey stays running in the system tray, so it stays out of your way while it works. ... You also can hide the current window through a hotky. ... Show window property of application,such as window handle,class name,process id etc.
http://www.elongsoft.com/download/HWHSetup.exe - 883Kb - Download - Screenshot

HideHelper - Hide windows and tray icons
1. HideHelper supports powerful function of defining hotkeys(Hide/Show): one is temporary hotkeys,the other is permanent hotkeys,you can Hide/Show one or a group of windows by pressing the hotkeys being attached with specific conditions 2. HideHelper can change the icon and title of any window. ... HideHelper also supports the mouse action to hide window besides the hotkeys, you can hide the current active window by clicking the mouse's left and right key together 6. ... HideHelper can hide the parts of a window with the mouse action.
http://www.qwerks.com/download/7848/HideHelper.exe - 701Kb - Download - Screenshot

WinHide
WinHide is a program that quickly hide your working programs and windows. You don't need to close your working applications, just hide it. The hidden programs are not displayed in the Taskbar, in Ctrl-Alt-Del list or in task manager and they cannot be activated pressing Alt+Tab, but programs... You can set hotkeys for basic program commands: Hide/Show active window Hide/Show all windows Hide/Show a group of windows. ... While your applications are hidden, they still work and you can show them at any time.
http://pwp.netcabo.pt/zcsantos/products/WinHide1.exe - 993Kb - Download - Screenshot

Taskbar Hide - hide windows program
With Taskbar Hide you can fully control the taskbar. As a hide windows tool,it could hide windows program (hide applications,hide program) completely through a hotkey,also you can minimize them to the system tray instead of an icon on your taskbar. You also can change the icon and title of any... Show window property of application,such as window handle,class name,process id etc. ... Hide any of following:taskbar,start button,task window,system tray, and time clock. ... Hide some of the less used icons from the system tray.
http://www.eusing.com/Download/THSetup.exe - 747Kb - Download - Screenshot

HideIt!
HideIt! is your personal data key. With its help, you can easily and reliably hide any files on your home or work PC from outsiders, and unauthorized users. Nobody except you can get access to your hidden folders and files. No one will ever know that you made some of your files invisible to... But how is it possible to hide data without any complicated actions and any professional computer skills or knowledge? ... The program itself does not require any installation and does not create any suspicious program files or other attributes that could attract attention and show that you are...
http://www.guard-software.com/products/hideit/hideit_setup.zip - 708Kb - Download - Screenshot

Quick Hide Windows
Quick Hide Windows by CronoSoft is great for hiding program windows with a press of a hotkey combination. You easily bring them back with another combo. Hiding the taskbar and desktop icons is just awesome. Password protection allows you to lock QHW to prevent intruders from trying to show... You can even lock your computer with QHW instead of a weak, easily hackable screensaver password.
http://www.cronosoft.com/files/qhw.zip - 994Kb - Download - Screenshot

Hide Window Plus
Hide Window Plus lets you instantly hide any window off your screen with a single keystroke or right click on the Close button. Plus this utility allows you to quickly run a screensaver, turn off monitor or mute sound using hotkeys. Program runs invisibly in background and doesn't clutter your...
http://www.hide-window.com/hidewin.exe - 588Kb - Download - Screenshot

Plancoin
Plancoin allows you to hide selected windows in one keypress. It lets you set up two hot keys: one to hide the windows and show them back, and one to show the Plancoin Settings window. The program then runs in the background and responds to the hot keys. ... In the Exclude mode, every window whose title does not contain any of the sentences will be hidden. ... As Plancoin needs to run in the background all the time, it has been designed to use as few system resources as possible. ... This mode is the default one.
http://prdownloads.sourceforge.net/wistinga/plancoin-0.1.exe?download - 98Kb - Download - Screenshot

4t Tray Minimizer Free
4t Tray Minimizer lets you running applications minimized as System Tray icons, which helps in adjusting free space on your taskbar. To minimize any application to the task bar, simply left click the minimize button as usual or press keyboard shortcut. ... Desktop Enhancements: - Hides system tray icons - Launches Desktop programs from the system tray - 'Minimize to tray' and 'Hide window' buttons on the titlebar of any window - 'Minimize to tray' and 'Hide window' items in the system menu of any window Minimizing to tray: -Minimizes to tray any application.
http://www.4t-niagara.com/4t-min.zip - 613Kb - Download - Screenshot