Wikimapia is a web service that allows users to edit information on a world map in a wiki format. Users of the site can add places, edit them, and get the information previous users have entered. The info there is currently pretty sparse, but the service is rather new. The company also recently released a Wikimapia API that supports getting information from the web service.
For music enthusiasts who thrive on insider knowledge and detailed music conversation, WhoSampled would be just their cup of tea. It's basically an online community for discovering and discussing sampled music, remixes and cover songs. WhoSampled has partnered with The Echo Nest to provide the WhoSampled API that allows developers to access and integrate its functionality with other applications.
How many companies that sprouted in 1724 can boast of an API launch in 2012? Pearson, now in its 288th year, has announced its 7th API. Pearson, continually finding value in the API method of market strategy, expanded its resources available via API with the dkimages API. The latest in Pearson's API lineup consists of "an encyclopaedic collection of 90,000 high-resolution images, ready to [integrate, and range from] classic whilte background shots to in-situ images." The API allows developers to integrate the collection with existing apps through purchasing, listing, viewing, or searching for images.