Many artists like pallets, holding pencils and brushes in their hands, working with the textured surface of a canvas or paper. But many of the same artists are going digital due to the rise of more online based media. The iPad has become a very powerful tool when it comes to creating all sorts of art. More and more very high quality apps are being released for all types of artists whether they be painters or sketchers. Here are 15 awesome apps for painting and sketching.