MM Taskbar is useful if you work with a multi-monitor setup. This tool extends the Windows Taskbar to all of the additional screens you've got set up. The Windows will not extend the TaskBar to the other monitors and all windows will be shown on the single windows taskbar on a primary monitor. It adds second taskbar to the extended desktop on Monitor 2. It can add third taskbar to the second Extended monitor if you have 3 monitors setup. It shows only applications from that Monitor. It hides the applications on Monitor 2 and 3 from normal Windows Taskbar.