FlickrFaves
FlickrFaves is a small utility for downloading high-resolution versions of your Flickr favorites to your harddrive. FlickrFaves is a cross-platform utility written in Java.

findr
The most interesting feature of this experiment is the ability to refine your search by eliminating tags. When you click on a tag, flickr returns that tag’s list of related tags. Findr then compares that list with the previous list(s) of tags and displays the intersection.

Feel Image
Feel Image is a new image search engine service that lets you type in some feeling words to help better find the photos you’re looking for.

Flickr Flipper
Flickr Flipper allows you to search for Flickr photos and also search for photos from specific Flickr users. It uses Papervision to display the photos one at a time and even allows you to download the photo to your computer.

FlickrFight
FlickrFight is a new Website which helps you to compare the Images. You select the keywords or tags to be contested. The one with the most images on site, wins the fight.

Flicktionary
Test your guessing skills and flickr picture choosing skills in this fun twist on pictionary.

fastr
A flickr game to guess the tag of a photo.

Fleace
Fleace, the Flickr-Enabled Automatic Changer for Everyone, is a free wallpaper changer that retrieves pictures from Flickr based on topics of your choice.

Flickr Finder
Flickr Finder is a Mac application for browsing Flickr photos without a browser. The interface is similar to the Mac Finder.

Flexplore
Flexplore allows you to view photos that have been seen before and finds new photos that match your tastes and likings.

Foldr Monitr
Free tool that runs in the background and watches a selected folder (and optionally subfolders) waiting for you to add photos to it. When photos appear in the folder, Foldr Monitr automatically uploads them to your Flickr account for you.

Flishr
Windows application to Download, Upload and Search photos from one central command console on your PC.

Flickr photo owner finder
Helps find who took a particular Flickr photo that you have saved.

Flickr4Writer
A simple plugin for Windows Live Writer which allows users to browse a Flickr users photostream and insert an image from Flickr into a Writer post. Application of this tool in Flickr4Outlook and Flickr4Word

Flickrmap
Put a flash based world map on your own website or blog.

Flickratr
Vote between 1-10 for different flickr images.

FAlbum
WordPress plugin that allows you to display your Flickr photos and photosets on your site.

flickrsavr.py
A python script that automates the process of saving the URLs (of public photos), and also saves a local copy of thumbnails, and stores descriptions, dates, and tags in a database.

FlickrFavs
An application for downloading your favorite photos.

Flyr
search flickr for geotagged photos.