It is very simple and easy to use, its intuitive interface is not very eye-catching, but Flickr Downloader is very easy to use. It offers you a browser where you will be able to surf the web, search and download flickr photos and rate them.
Choose the quality you want the photos to be downloaded (high, normal, low) and the folder, then, you only have to surf the web. If you find any Flickr photo you want to download, just click the save button and it will be automatically downloaded to your HD, having it ready to use in your computer.
Finally, Flickr Downloader is totally free.
It can also save entire sets in one click