Paper, by FiftyThree, is an elegantly designed sketch and idea journal for the iPad. The minimalistic controls and intuitive user interface form a pleasant user experience; after using it for just a few minutes, the app affirms its title as an Apple Design Award Winner for 2012.
As the iTunes Store says,
Paper was designed from the ground up for touch and creating on the go. No fussy buttons, settings or other distractions. Paper works the way you think, like a familiar notebook or journal. Have all of your ideas with you in one place.
The sketches are contained in notebooks, and can be shared via email, Tumblr, Twitter, etc.
The initial free download from iTunes does not come with the full set of “pens”, but the full suite can be downloaded for $6.99
Price: Free; $6.99
Video Preview: http://vimeo.com/37254322#at=0
Tutorial: None (needed)