Gesture Touchpad for Win8
Turn your iPhone or iPod touch into a wireless touchpad and keyboard for your Windows 8 computer with this utility app.
You must first download the free companion software for your computer from Splashtop's website. Then launch Gesture Touchpad on your iPhone or iPod touch and your computer will be discovered automatically. Once everything is connected, you'll be able to control your computer with multitouch gestures, key combinations, and virtual mouse clicks.