The uHunt PHP Client Library by Kaspars allows developers to integrate the ability to retrieve information from UVa's online judge into their PHP applications. This library is offered under the MIT License.
Google believes its latest API will provide developers with the app install data they need to make effective marketing decisions. The Play Referrer API grabs core information directly from the Play Store to help validate referral content and prevent fraudulent activity from sapping your resources.
The combined knowledge of an entire company's staff can be a powerful tool in productivity and moving forward. Many systems exist that aim to help businesses make knowledge sharing within an enterprise a streamlined process, but a lot of them may lack that 'something' that motivates the staff to actually participate. Deskarma is a knowledge sharing solution that also includes game mechanics and a scoring system that is aimed at motivating staff to get involved. The Deskarma API allows developers to use this functionality and integrate it with other applications.