Flickrbook lets you showcase your Flickr photos and sets on your Facebook profile. Plus, with Flickrbook, you can tag your Facebook friends on your Flickr photos and see photos of yourself tagged by your friends.
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Google APIlity Library
Flickr Api Explorer
RFacebook Ruby Gem
Rfacebook: Ruby on Rails Library for Facebook
MKAbeFook: Cocoa library for Facebook
Java Library for Facebook
ASP.NET Library for Facebook
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.