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.

Travelr
Travelr is a free photo gallery viewer that you can put on your own site. Travelr lets you display your Flickr photos geographically on a world map.

Flickr Image Gallery
An Ajax image gallery with fade effects for transitioning of images and populated using JSON data.

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

PicMarkr Pro – $21.99
Watermark images, protect your pictures copyright,
import and backup Flickr images to your computer
with PicMarkr Pro

PicMarkr
Add custom watermark (image or text) to your images online and free.

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

FlickrSync
Photo synchronization application for flickr users. Manage all your photos locally and FlickrSync will keep them updated in flickr.

Statr
Collects data through api calls and allows you to track and plot page views statistics for your Flickr account.

rTagger
Organize your Flickr photo collection by modifying tags offline.

Desktop Flickr Organizer for Gnome
This application allows online/offline mode management of your photos. You can upload, search and download photos, through the easy to use interface.

AlphaLearnr
Flickr Mashup which helps children to learn the English Alphabet through photos.

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

Flickr set manager
Lets users automatically create new sets on flickr based on various criteria such as interestingness, date posted and tags, or even from a random set of photographs.

Most Interesting Pictures
Enter Flickr username to see their most interesting pictures.

Flickr AutoDownloadr
Windows Application to view Flickr photos in a fullscreen slideshow. Useful for displaying a group of photos on a laptop or TV

Flickr Album Maker
Make photoalbums using Flickr photos. Based on the php tools by Oberkampf.

FlickrFavs
An application for downloading your favorite photos.

Flickr Explorer
Mass photo downloader for Flickr.

Flickr Importr
A tool for Windows that allows you to upload images to Flickr and automatically add them to groups and sets.