Input Director is designed for those folks that have two (or more) Windows systems set up at home.

Using Input Director, you can position the monitors of your systems side-by-side and then control all of them via one keyboard/mouse.

To transition which system you're controlling is as simple as moving the cursor off the screen on one system and it'll pop up on the next screen (similar to a multi-monitor setup) or via a hotkey combo.Input Director also lets you share clipboard contents, so you can copy from one machine, switch over to another and then paste.