Spriting? As in drawing out 2D sprites used in games? Off the top of my head no, I don't think there are any actual spriting apps. Though I'm sure you could find some animation apps and drawing apps. Plus I know there is an app out there where you use 3D cubes to build 3D sprite like pictures or characters.
I probably thought so or that you already knew about it since it was an add for itunes. Good luck on finding one as I am pretty sure there is none. I would ask dave since he always loves to find these sorta things
there is one sorta its soliddots or something like that but itsorta makes the thing 3dish i dont know i downloaded the free version but never got around to using it. i know there is another one i just dont rember what it is. sketch book is paintbook is also really good if you want vector graphics. has anyone tried layers? im gonna go shopping now so if i find any other pixel art apps ill post it