Ghost-It!: is a program that runs in the system tray, and lets you turn windows into "ghost" windows. Ghost windows are special windows, taking advantage of Win2k/XP translucent features.

First of all, a ghost window is translucent, meaning you can see through it to whatever is underneath. Secondly, a ghost window will always appear on top of other windows. Thirdly, when a ghost window loses the input focus, it remains translucent and always on top, but all clicks will pass right through it like it wasn`t even there—until it becomes the active window again. The level of translucency can be adjusted to your preference.