Duet Display 3.0.0.1 Touch screen extension for Windows

Duet Display turns your iPad into an extra display for your computer using the Lightning or 30-pin cable, this application delivers a retina display at 60 frames per second with zero lag. It is a freeware screen sharing application that's user friendly, efficient, straightforward, well-designed and modern.

Here is a screenshot to illustrate the features and user interface of this application: