Livescribe today followed trends today by launching its own app store for its intelligent pens like the Pulse. The unusual addition uses a combination of the pen output, screen and audio features to provide a mix of games, education tools and utilities. In many cases, users draw some of the interface itself; language tools speak dialogue.

The service is currently in a beta stage but has its own free SDK. Most apps are free or cost less than $10 and don't require a computer connection to work.