One app I did not think to be posibile just with an Android Smartphone.
What is MultiSketch?
MultiSketch is an Android free app you can download it from Google Play and witch is let you draw something on the smartphone display. Nothing extraordinary so far.
However if you look at the first screenshot you will see a URL. If you point your browser at that URL you will see the screen of your phone and you can see in real time what you draw or write .
So what is so interesting on this app?