I'm always amused when people say the iPad is really not a productivity tool. If it only allowed web browsing and email, it would greatly enhance my productivity. Of course, the iPad does much more than that and a case in point is the universal iOS app Note Anytime.
The app creates a whiteboard on your screen and lets you take notes, create graphics, insert photos / graphs, sketch and then share your work via email or social networks. I took a look at the app last year, and it has been substantially enhanced with new features and better sync tools across platforms. Users now also get 2 GB of free cloud storage.
In its latest version, Note Anytime adds handwriting recognition and predictive text in 13 languages, which is no small achievement. While Note Anytime is free, adding handwriting recognition in one language is US$7.99, and recognition in all 13 languages is $19.99. There are also some paid options for different bold inks and some templates. None of those options are required, and if you don't want handwriting recognition you can get along fine with the free version.