This is cool little application for Windows 2000 and XP desktop system. It allows you to set transparent windows of any program running in Windows 2000 or XP. However, this program does not currently work for Windows 98 and below.
The ability to set transparent windows can allow you to be more productive with numerous windows open at once, even on a smaller display.
I have enjoyed something like this with both UNIX and Linux desktop systems.
Download ChaosCrystal at elgorithms.com