Flickraw is a Ruby library that provides an interface to the Flickr API. Data returned through the interface is presented in a simple and intuitive manner. Because the library's methods are fetched from Flickr when it loads, the library is always up-to-date.
Photo editing service Aviary has added a new HTTP-based API that allows developers to pass photos through filters, effects and even basic editing operations. Aviary "soft-launched" the new Aviary Effects API last week at SXSW, when we interviewed Aviary's Michael Galpert (video below). The new service could be used to create photo-sharing services like Instagram, CMS plugins to aid workflow or within social applications to create a standard look to all avatars.
Why did Pinterest remove its API documentation earlier this year? Well, apparently there is no rush to release an already developed API to the public yet. In fact, it may not be released for a while as Pinterest wants to avoid re-tweeting the #mistakes Twitter made in its infancy.