miniMIZE is a small application that catches windows that you minimize and puts a thumbnail of the application window on your desktop. miniMIZE has the ability to clear the taskbar of minimized windows and instead put floating thumbnails of minimized application on the desktop. miniMIZE comes handy if your taskbar gets congested.
The thumbnails can be dragged and placed on any position on the screen. They can also be configured to appear automatically at any defined screen edge. miniMIZE thumbnails can either stay always on top facilitating all-time access or can stay only on the desktop according to your preferences.
Bad news is miniMIZE works only on Windows XP.