My wife recently installed the snapseed application on her iPad, and I really like how the help screens for each of the functions snapseed offers comes across as being hand written/hand drawn.

Short of actually hand writing and/or hand drawing stuff and scanning it in, does anyone know of an application that would provide me with the ability to create similar images for using in presentations and such? I'm by no means an artist, and my hand writing sucks, so scanning stuff in is out of the question. :-)