Flickcurl is a library for implementing the Flickr API in C. This library supports the entire Flickr API, including functions for browsing, searching, and uploading photos and videos. It comes with a program called flickrdf that turns a photo's metadata, tags, machine tags, and places into RDF triples descriptions.
Access to software that performs complex operations has been, and can still be, costly. Paying for expensive licenses can mean an alternative solution has to be sought or worse still, a feature won't be developed at all. Thanks to virtualization and a many other cloud features, we've seen these complex operations offered as services at a fraction of the cost. One such complex operation is that of facial recognition. This software hasn't seemed accessible at all with only applications such as Google Picasa, Apple's iPhoto, Facebook and more recently XBox Kinect being the most obvious examples where it has been used. These are big companies with big money to spend. This now changes as Face.com is offering a free to use face recognition API for photos.
The Rekognition API differentiates its feature set by processing images to recognize more than just the location of faces. Rekognition's technology will analyze a given photo and present a list of scenes, each with a probability rating. Faces are not simply identified, but are also classified for age and emotion.