The Flickr Ruby library by Maël Clérambault aims simplicity of API access. What it does is to map the methods of the official API docs. At the same time, it returns methods intuitively. This library is always updated because of the introspective features of the new methods added continuously by flickr.
Netflix continues to see tremendous growth in its Netflix API. The API which saw humble beginnings in 2008 has taken a giant leap in usage, ever since Netflix started streaming functionality to devices. In what could be one of the largest usages of a public API, the current number of requests for its API is around 20 billion per month and increasing by the day, forcing Netflix to look at measures to decrease them.
Facebook's Mark Zuckerberg has announced a new acquisition. The team behind Instagram will now be part of Facebook. The most compelling piece of Zuckerberg's post declares that Instagram will remain an independent product, which is good news for the Instagram API.