This one is good, really. A small versatile program which turns off your monitor in a click or two. It does many other jobs but this one caught my attention. Useful for laptops that don’t have a button to switch off just the monitor without bringing the computer to standby or hibernation.
To turn your monitor back on, just move the mouse.
Instead You may like changing settings in power options but that is not such a handsome idea.
So, go for Wizmo ( works with Windows 7 as well ) , compatible with windows OS only.
For more info :