iWhiteBoard lets you to draw anywhere on iPhone whether you are playing games, watching videos on Youtube. This app is a mobile-substrate extension and it works through Activator. All you need to do is to shake your device and iWhiteBoard will launch without quitting the current app and you can draw random patterns. Current version supports only 4 colors and thing that I didn’t like is you cant save the patterns that you draw, though you save it by taking the screen shot(by pressing home+power button). You can also change the activation method from Activator. Overall this is an OK app, Current version is lacking many things; on of’em is limited color option.
iWhiteBoard is available on cydia under BigBoss repo for $0.99.