Portrait of a cat painted on a tablet using the Serious Paint Android app
Here is a digital art of a cat(!) painted on an HP Touchpad running Android Jelly Bean using this nice free app - Serious Paint and a cheap rubber tip stylus. The Serious Paint app looks similar to another Android app for painting - Infinite Painter but it is much more stable; Infinite Painter keeps crashing all the time to the point that you can't do anything worthwhile.