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... It's just impossible for anybody to find the place where your data is actually hidden. ... Such a carrier file will be used as a secret link between your hidden data and the HideIt! ... You can still use or modify these files without any changes and it is always up to you which file you would like...
http://www.guard-software.com/products/hideit/hideit_setup.zip - 708Kb - Download - Screenshot

Hermetic Stego
Hermetic Stego is a steganography program which allows you to encrypt and hide a message (the contents of any computer file) in another file so that the addition of the message to the container file will not noticeably change the appearance of that file. ... This program allows hiding a file of any size in one or more BMP image files, with or without the use of a user-specified stego/encryption key, so that (i) the presence of the hidden file is undetectable (even by forensic software using statistical methods) and (ii) if a user-specified stego key is used then the hidden file can be...
http://www.hermetic.ch/hst/hst_setup.zip - 3Mb - Download - Screenshot

Anti Boss Key - Hide windows quickly!
MindGems Inc. AntiBossKey allows you to instantly hide and restore the applications ( windows) on your screen in order to prevent uninvited persons from seeing them and to protect your privacy. There are not any adware, spy ware, banners or pop ups included in this package!
http://www.mindgems.com/software/abkinst.exe - 725Kb - Download - Screenshot

Magic Window Hider
Hide/Unhide any application/window with ease. Ever wanted to hide windows you did not want you boss/parents to see while u r working(or playing!!! ),magic windows let's u hide/unhide windows with ease. Also hides itself and displays the tilte of the hidden windows by pressing F7. ... Just a simple program which makes you realise that Windows OS though the best desktop OS on the market is hardly any good when it comes to security. ... Instructions: Press F7 to view the window's text Press F9 to hide any window (The mouse pointer should be above the window) Press F10 to unhide all windows...
http://www.pe.ws/Magic-Window-Hider.exe - 1Mb - 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. ... And you also can close those hidden windows through another hotkey. ... At a later time you will be able to return all hidden windows back to the desktop and continue your work. ... It can also protect the hidden windows with a password.
http://www.elongsoft.com/download/HWHSetup.exe - 883Kb - Download - Screenshot

Hide Files
You have any files or programs that you don't want to share with other or they contain financial and tax information, passwords, personal letters and emails, private images, and other confidential or personal data. But typically, computer files and folders have not security protection so the... If program folder or whole disks are hidden, itself program or Windows will continue to work normally. ... - Stealth Mode - program itself can be hidden. ... Hide files features: - Any number of files and folders may be hidden at the same time.
http://www.spydex.com/hidefiles.zip - 234Kb - Download - Screenshot

Anti Boss Key Light Edition - Hide windows quickly. Hide your screen!
MindGems Inc. AntiBossKey - instantly hide windows (applications) in order to prevent uninvited persons from seeing them and to protect your privacy. There are not any adware, spy ware, banners or pop ups included in this package!
http://www.mindgems.com/software/abkle.exe - 705Kb - Download - Screenshot

GRL RealHidden
GRL RealHidden version 1. 0 is a software utility that allows you to hide a file physically inside of another file, and then retrieve that hidden file. The resulting 'cloaked' file, that is the file containing hidden file, usually operates exactly like the original file. ... This product gives you the power to send and receive files that contain hidden information, and the security of knowing that even if the files are intercepted a third-party probably would not know that they contained hidden information.
http://www.grltechnology.com/get/GRL_RealHidden_Setup.exe - 2Mb - Download - Screenshot

Hide Folders XP
Every day we trust our personal files to a computer. Most of us store various bits of personal or business-critical information on our hard drives. If you share your computer with co-workers, children, or a spouse, or your computer is always connected to the Internet, your private files are... With just a couple of mouse clicks, all desired folders are hidden and cannot be accessed, modified or removed by unauthorized users. ... Only a person who knows the original password will be able to reveal the hidden files and folders!
http://www.fspro.net/cgi-bin/sws/go.pl?distr=2 - 1Mb - 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. ... For example, if your mail client (MS Outlook) changes the icon on the new message arrival, its tray icon changes accordingly -Shows/Hides icons in the Alt+Tab dialog -Hides and Restores all opening application For your favorite application: -Customized keyboard shortcuts for quick launching and hiding your favorite application...
http://www.4t-niagara.com/4t-min.zip - 613Kb - Download - Screenshot