A while ago I wanted to build an alternative to the moleskine for the iPad. I never was able to make it happen, primarily because getting quality handwriting on the iPad was beyond my skill level. Today I learned about a new app that just came out that is absolutely incredible. It's free, but I'd recommend immediatley buying the extra tools within the app. It's still a bit new for me, but if there were an app that would make my note-taking digital, this would be it. Download Paper.
"The team spent months painstakingly figuring out how to emulate materials on a digital screen. For example, they had to understand how lead plays on the texture of paper, and how pen ink moves when you apply an artistic wrist flourish. Even more time was spent getting watercolor paint to bleed just right when you hold down your finger in place. Swipe your finger side to side quickly and the watercolor smudges like you'd expect it to. The point here is providing real tools to use every day while sketching, drawing, and creating — and to that extent FiftyThree has succeeded." - from the Verge