Sharing 1 keyboard and mouse over multiple PCs

In the past, we use hub switcher like KVM kit for sharing 1 keyboard or mouse over multiple PCs.  But did u wonder software also can able do that magic.. Try take a look at below link for the solution.

http://lifehacker.com/254648/how-to-control-multiple-computers-with-a-single-keyboard-and-mouse

KVM kit sold at http://intrl.startech.com/Server-Management/KVM-Switches/2-Port-USB-VGA-KVM-Switch-with-File-Transfer-and-PIP~SV231UAF