My favorite notepad is simply a 8.5" x 11" piece of cheap copy paper folded in half. Every time I buy a sketchpad or notebook the paper is too grainy for my taste.
Sometimes i'll fold the paper a second time to fit in my pocket, but I draw on it folded once. With it completely unfolded the paper is too flimsy and the canvas is too big but with it folded once it is just right.
![;)](http://192.241.182.11/images/smilies/wink.png)
Try this method with the previously mentioned pens/pencil and you'll crank out some art.
Sorry for veering off topic, I'd ask Rimrook about the apps.
@Tet, i'll have to try the gel version, I was always curious about it.
@Captain, looks cool what is it? You should consider industrial design.