WindowsTiler is a utility that combines 4 monitors in one screen, can maintain overlapped windows layers of the virtual grids that are built inside independent virtual desktops. The purpose of such organization is to get structured view of the opened windows that can be resized according to the table rules so that structure of the table layout will remain unchanged. There are couple of dozen possible layout model to choose from and the set of the available model depends only on the number of the opened windows.
After installing application you will see in the system tray the icon of the program and 4 buttons one for each virtual desktop. Buttons are for switching between desktops and program icon is for mapping desktops into table and managing overlapped windows.
If you move mouse to the program icon or click on it with the left button a map of 4 virtual desktops will popup. When you have some windows opened WindowsTiler will assign all of them to the first virtual desktop. Later as you activate different desktops and open new windows they get assigned to currently selected desktop.

WindowsTiler Features:
1. 4 virtual Desktops
2. Intuitive non-click way to switch between desktops
3. Instant reposition of the popup windows in non-cluttered arrangements
4. Drag and Drop windows between desktops

The license of this software is Free Trial Software, the price is $14.95, you can free download and get a free trial.