ScreenOff is described as 'freeware that lets you turn off the display on your Windows laptop monitor screen in a click, without putting it to Sleep. Turn it back on by moving the mouse'. There are more than 10 alternatives to ScreenOff for Windows and Linux. The best alternative is MonitorES (Monitor Energy Saver), which is both free and Open Source. Other great apps like ScreenOff are Monitor Off Utility (Free), Display Power Off Utility (Free, Open Source), M_off (Free) and Monitor Off (Free).