Flickr is the no doubt the king of all photo-sharing sites. If you are only interacting with Flickr via the web interface, you are missing out a lot of powerful features provided softwares that use Flickr API. The people at hongkiat.com have gathered a great list of tools to enhance your flickr experience. Digg it if you like it!
Found via Digg.
Keywords: Flickr, Flickr API, Tools