Viewfinder dramatically simplifies the process of finding, downloading, and using images from Flickr. Viewfinder searches Flickr's four billion photos in a snap to bring you the images you need. You can search tags, titles, and descriptions, and sort by most interesting, most relevant, or most recent. Viewfinder also helps you find images with Creative Commons licenses and generates attribution text for you. No Flickr account required.
Note: Viewfinder is no longer under development, and it is no longer available for sale.