With the simple manager who is hidden behind an icon in the system tray (usually at the bottom right corner of your desktop), you can identify the top windows and change their topmost status. For the active window you can use the key combination Ctrl+Alt+T. In the last version of the program we are added the visually effects, that make it easier to recognize the new topmost status.
The app is very simple, but does well what it should do. Moreover this application has a graphical user interface, another application are usually not visible.