Backstep is a program that draws icons for minimized windows on your desktop. It doesn't depend on the window manager or on a desktop-drawing program. It is meant to work with window managers that are EWHM compliant.

Known Window Manager Support: * Metacity: known for sure to work * Xfwm4: known for sure to work * Fluxbox: known not to work * Kwin: partial support * Other: untested