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.

Splashr
Splashr is an application for presenting Flickr photos.

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

Retrievr
Retrievr is an experimental service which lets you search and explore in a selection of Flickr images by drawing a rough sketch.

Flickr Color Selectr
Flickr Color Selectr allows you to search for images on Flickr based on the primary color within the image.

Flickr Logo Makr
Flickr Logo Makr allows you to create a flickr style logo.

Memry
Play a memory game with photos from Flickr.To start playing just type a tag and click ‘play’.

Mosaickr
With mosaickr you can create beautiful mosaics from your flickr pictures, and even print them on posters!
Creating a mosaick is easy and it’s free.

Wallpapr
A simple Ajax web app that spits out a selection of photo wallpapers from Flickr’s Wallpapers pool on demand. Type to search for wallpapers using keywords of your interest, you will receive the results as thumbnails.

Color Hunter
Color Hunter is a place to find and make color palettes created from images. When you search for color palettes by tag, ColorHunter.com searches Flickr.com via Flickr’s API for images labeled with the tag you entered. The thumbnails of the Flickr images are used to create a color palette.

Earth Album
Earth Album is a simple Flickr mash-up that allows you to explore some of the most stunning photos in the world courtesy of Google maps and Flickr.

PlantWire
PlantWire uses publicly licensed Flickr photos to identify flowers and plants. Currently, their floral database contains over 300 plants and over 6000 images.

Compfight
Uses Flickr’s API to search the database of photos and then feeds back the results as live clickable thumbnails.

Girls of Flickr
Browse around for sexy photos on Flickr babes and Flickr girls

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

Flickr Hive Mind
A data mining tool for the Flickr photography database, allowing search by: metadata tags; Flickr photography groups; Flickr users, contacts, and favorites; text annotation; the Flickr Explore algorithm for interestingness.

Flickr Cover Flow
Cover flow slideshow web script like iTunes for your Flickr photos.

nFlickrViewer
SimpleViewer with full Flickr thumbnail and full-image support

Badge Creator
Create a dynamic Flickriver badge to put on your profile, group, blog or website

Flickriver
Allows viewing of Flickr photos in an infinite “river of photos”. Also has new ways to explore and view Flickr photographs.