The drf-json-api is a parser and renderer for the Django REST framework. It also adds support for the JSON API specification, but it doesn't provide any of the additional functionality one might normally find in a JSON API.
Culture24's SOAP API allows developers to import or query Culture24's events, resources, and venue information such as opening hours and address, among other types of data from their Direct Data Entry Database. The API has a single method, SearchRetrieve, by passing a SearchRetrieveRequest that returns a SearchRetrieveResponse in XML.
Who needs a tracking service when you can just hop on the USPS, FedEx, UPS, or DHL website (or whoever your carrier is) and just track? Maybe you. The Trackthis API integrates an amazing array of functions into your application. The API webpage lists over 10 carriers you can get notifications for.
Nathan Kontny is out to revise how you write, especially when you work with others. His online word processing program, Draft boasts features you can't find in any other wordprocessor--like a professional editing service, for example.