This SDK allows for the addition of Kairos Facial Recognition to web applications using PHP programming language. The documentation includes a Kairos.php class that can be used as a client for the Kairos Facial Recognition API. To access the SDK the user is required to have an environment configured for PHP scripts.
As announced on the Flickr Blog, Flickr has launched a new website for developers: Flickr Code. And besides announcing the new site they've both a) given interesting details on just how much API traffic they do each day (see below), and b) they announced they're open sourcing Flickr Uploadr, the cross-platform (Windows and OS X) desktop tool for uploading photos to Flickr.