MultiMonitorTool is a small tool that allows you to do some actions related to working with multiple monitors. With MultiMonitorTool, you can disable/enable monitors, set the primary monitor, save and load the configuration of all monitors, and move windows from one monitor to another. You can do these actions from the user interface or from command-line, without displaying user interface. MultiMonitorTool also provides a preview window, which allows you to watch a preview of every monitor on your system.
System Requirements and Limitations
This utility works on any version of Windows, starting from Windows XP and up to Windows 8. Both 32-bit and x64 systems are supported.
Nice review from HAL9000 at Raymond Forum Control Multiple Windows Displays with MultiMonitorTool