Flickr is one of the most popular online photo sites on the web. One of the reasons for that is the incredible amount of free, 3rd party tools that use or run using flickr. A great example of the variety of different tools available are the many games on the net that use flickr. Here are 12 of the best flickr games I've been using:
AlphaLearnr
Flickr Mashup which helps children to learn English Alphabet through photos
Fastr
Game that shows you photos and you guess the tags before other people do.
Fillustrator
Write a story and each word is illustrated with an image from Flickr.
Flickr Sodoku 1
Sodoku using flickr images with lots of options, difficulty settings and a solver
Flickr Sodoku 2
Game that uses sodoku using flickr images
Flictionary
Type your guesses, flickr will listen and help you draw new photos.
Guess the Name
Quicker you guess the title, the more points you earn
Memry
Flickr rendition of the old memory game.
Name That Contact
Quiz-how well do you know your Flickr contacts?
PhotoMunchr
Use your arrow keys to move across the gameboard and "munch" photos
Tagman
Hangman game for Flickr tags.
Wordmingle
Daily vocabulary and pictures from Flickr according to each word.
UPDATE: A NEW FLICKR GAME IS NOW AVAILABLE: Photo Slider Game for Flickr