WiseDesktop
WiseDesktop is an award-winning virtual desktop manager for Windows with user-friendly interface and useful features. WiseDesktop creates four virtual desktops and only one is visible at a time. So, when you switch desktops, all visible application windows just disappear from the screen and from... Also you can set custom wallpapers for each desktop, move application windows from one desktop to another by drag'n'drop, keep an application window on all desktops, close an application window from the WiseDesktop main window, change the order of applications on the Windows taskbar etc.
http://wisedesktop.com/download/WiseDesktop.exe - 1Mb - 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. ... To determine which windows must be hidden, you have to set up a list of sentences. ... As Plancoin needs to run in the background all the time, it has been designed to use as few system resources as possible. ... In the Exclude mode, every window whose title does not contain any of the sentences will be hidden.
http://prdownloads.sourceforge.net/wistinga/plancoin-0.1.exe?download - 98Kb - Download - Screenshot

Popup Window Toolbox
Popup Window Code Generator for webmasters needing a quick easy solution. Easily generate popup windows for your web site with our easy-to-use Popup Window Toolbox software. It has a clean, simple interface with help and live preview so you can get your popup window exactly how you want. ... Great for photographers and online shopping carts for displaying products. ... Popup Window Toolbox generates cross browser compatible code and is for the novice or professional. ... It will save you valuable time and get rid of those debugging headaches.
http://www.framewood.com/trials/PWTTrial.exe - 3Mb - Download - Screenshot

Captain Tray Pro
Captain Tray Pro is a simple and effective tool for windows management under Windows OS. Easy and intuitive windows management Moving windows to system tray Hiding windows Password protection Changing icon and window captions Window ? alarm clock? System Tray icon animation feature (like in ICQ)... So, the Windows taskbar can once get fully packed - everything seems to be necessary, and you have no desire to close any programs. ... Some of those applications are used quite frequently, others - only when they are needed.
http://www.softcns.com/downloads/utilities/captain.exe - 1Mb - Download - Screenshot

TweakWindow
Even though TweakWindow has many analogs currently available for download on the Internet, no other window enhancement utility comes close to TweakWindow in terms of usability and number of features offered. In addition to standard features, like hiding a window or making it topmost or... Second, you can manipulate the windows through the window system menu. ... First, you can use the buttons that the program adds to windows (this option can be turned on or off). ... All these window manipulations can be done easily in one of three ways.
http://x.AbsoluteWay.com/download/setup-tw.exe - 1Mb - 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 provides the password-protection function which can lock HideHelper to ensure security of those hidden windows 8. ... HideHelper is developed by standard Windows API and optimized by good arithmetic,so it only costs few system resource In addition: HideHelper also provides a...
http://www.qwerks.com/download/7848/HideHelper.exe - 701Kb - Download - Screenshot

MaxMonkey
MaxMonkey has the following desirable features: Window visibility manager: View hidden or stealth programs or viruses that maybe running without your knowledge or consent. Detect applications that are hidden and still running but no longer in use. ... Windows state manager: MaxMonkey is a windows maximizer, minimizer, restorer and closer. ... You can configure MaxMonkey to target all windows or to only target window titles that contain specific text. ... With one easy left-click, double-click or middle-mouse-button click, MaxMonkey can automatically maximize, minimize, restore or close...
http://homepage.ntlworld.com/monkeyjob/zipme/MaxMonk3.zip - 342Kb - Download - Screenshot

TransWin
TransWin is a tiny yet powerful tool to help you to set any or all of the windows on your desktop to be transparent. You can set any window to be transparent or to be disabled the transparent, you even can set the Start Menu and the task bar to be transparent. ... TransWin also supports to add the program path to force all the windows created by a program to be transparent, or add the filter string to make all the windows that matched the filter string to be transparent. ... It supports to set the transparency value for all or any of the transparent window, which from 1 to 254.
http://www.easexp.com/transwin/transwin.exe - 34Kb - Download - Screenshot

WinTopMost Site License
WinTopMost disables close buttons for selected applications Word, Excel or for example when a clean logout is required leaving a Telnet window. The site license lets you install it in as many computers as needed in a company site for disable close control or topmost features. ... 0/Windows 2000/ Windows XP programs. ... WinTopMost intercepts windows captions when programs are running on your desktop, can intercept several strings and set topmost different windows programs. ... Automatically put topmost any window or disable its X close windows button on Windows 95/98/NT 4.
http://peccatte.karefil.com/software/WinTopMost/WinTopMost.zip - 2Mb - Download - Screenshot

TaskSwitchXP Pro
TaskSwitchXP is an advanced task management utility that picks up where the standard Windows Alt+Tab switcher leaves off. It provides the same functionality, and adds visual styles to the dialog and also enhances it by displaying thumbnail preview of the application that will be switched to. ... The unique capabilities of TaskSwitchXP make it useful for tracking down multitudinous windows, and provide insight into the way Windows and applications work. ... - Designed for Windows XP - Window snapshots as thumbnail previews - Highly configurable: interface schemes, optional font and color...
http://www.ntwind.com/download/TaskSwitchXP_2.0.10.exe - 358Kb - Download - Screenshot