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.
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.
According to a BBC news story, SpeakLike "crowd sources work to its pool of 3,000 translators, They can translate your blog into 35 languages and, incredibly, can even do tweets and live chats." Plus, they have the SpeakLike API.