The free-to-use Pokémon RESTful API (Pokéapi) is linked to an extensive database of Pokémon-related information- a true virtual Pokédex. Pokegem is a Ruby gem for Pokéapi constructed by GitHub contributor Brandon Weaver, enabling a simple interface with caching available for Ruby applications.
With Pokémon GO seemingly taking over the world as players walk around in search of the virtual creatures, one developer used the Watson Visual Recognition API to analyse screen shots of the app to locate nearby Pokémon, winning Best Use of Watson challenge at the AT&T Shape Tech Expo Hackathon.
If you rent games or movies, and you live in the United States or Canada, you probably know Redbox: those red vending-machine-type boxes where you can rent videos and games, any time of the day or night. What you may not know is that the Redbox API gives you access to its database.
For those who get their kicks out of a good old physical board game, BoardGameGeek is a fun application that may be of interest. It's an online board gaming resource and community that is constantly updated in real-time by it's growing list of users. Users from across the world can participate in reviews, ratings and live discussion forums, add images, find play-aids, access session reports and more. BoardGameGeek also provides the BoardGameGeek API which means this functionality can be easily accessed and integrated with other applications.