Revel Systems API makes it possible to run a cash register, a restaurant and a mobile point-of-sale system with an iPad as the center of the user interface. Check out what Revel has to say about the API on their website.
When Google announced its Maps Data API (our Google Maps API profile), it provided programmatic access to the features available in the Google My Maps product. With it, developers can create, organize and update maps. Could it also replace a database for holding geographic points?
SparrowOne has opened access to its managed payments services through its new Services API. The API allows for simple, HTTP POST access to SparrowOne's payment gateway. The API is expected to greatly reduce the time and effort needed for partner and client integration solutions.