rflickr is a Ruby implementation of the Flickr API. It includes a faithful reproduction of the published API as well as method encapsulation to provide more useful object mappings. rflickr features result caching to improve performance.
EBSCO announced that Sweden's Stockholm University has selected the EBSCO Discovery Service (EDS) which includes custom integration of the EDS API into the institution's library software platform. The University was looking for a reliable search and discovery solution that would be easy to integrate with the existing library software platform.
The stock photo site Unsplash recently launched APIs that grant users access to the site's entire library of over 30,000 high quality images. The API comes in two flavors: Unsplash Source and an entire JSON API. Unsplash launched a few years ago as a basic Tumblr blog.