WindowManager, A Handy Tool that lets you hide the application windows  
An Entry for every running window
Be the app or service using a window thats hidden or displayed, The tool lists all the windows that are running and lets you quickly and easily see whats happening on a hidden window or hide a window that you wish to run in background.
Download
Download the tool using buttons below. The source code is also open for any modifications of your convenience checkout git for it.