Flickr API

Flickr has an open Application Programming Interface (API for short). This means that anyone can write their own program to present public Flickr data (like photos, video, tags, profiles or groups) in new and different ways. The App Garden is a place where developers can showcase the applications they've created and where you can find new ways to explore Flickr.

Did you ever want to download all your photos on Flickr? Or see all images that have your favorite shade of pink? Or find new ways to upload your content? You can do that and much much more. We�d like to think of all the cool bits on Flickr as seeds for beautiful and inspirational interactions when given the right care from our awesome developer community.
More information: http://www.flickr.com/services/api/