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.
CanvasPop’s new Photo Printing API has already won the hearts and minds of big name photo and image partners like 500px, East Coast pixels (creators of the Photo Toaster app) and Selfless Portraits. Now, any web or mobile developer can integrate the photo-to-canvas printing API into their service delivery and automate canvas printing direct to the end-customer.
Appy Pie, cloud based mobile apps builder, continues to add to its list of supported APIs. Its latest additions include some of the most prevalent names in image sharing: Facebook, Flickr, Pinterest, Picassa and Instagram. The image newcomers to the Appy Pie portfolio allow developers to share images in realtime with users.
Finally, you have definitive proof that your significant other is only 52% happy. Face detection and recognition service Face.com has been busy since it launched its free API a year ago. The company has been adding servers to handle the load of the over 20,000 developers who signed up. It's also been adding features, the most recent the ability to detect the mood of a face, along with a confidence rating.