Glass2k - Small little program that allows Windows 2000/XP users to make any window transparent.
DeskPins - DeskPins can be used to make any application topmost, that is, to keep it above all other windows.
Peek Through - Title: Peek Through Description: Peek Through is an application for Windows XP, Vista and 7 which makes the foreground window transparent with the press of Hot Keys. You may adjust the amount of tr…
Skybn Window On Top - Window on Top can be used to make any application topmost,that is to keep it above all other windows.
Optimal Layout - Optimal Layout is a powerful Mac OS X application for managing your applications windows.
WindowTop - Easly set any window on top, just move the mouse to the top area of the window.