Flickr is well know image hosting website, web services and an online community platform for sharing stuff.
Flickrfs is a virtual filesystem which mounts on your linux machine like any other partition. Once mounted, it retrieves information about your photos hosted on your flickr account, and shows them as files. You can now easily copy photos from your local machine to this mount, and it will automatically upload them to your flickr account. Similary, you can copy the files from your mount to your local machine, and it will download your images from flickr.
Manish has all the information about installing FlickerFS under Linux and Ubuntu computer.
Desktop Flickr Organizer
Desktop Flickr Organizer (DFO) is a flickr photos organizer right on your Linux desktop. helps you store and manage a local backup of your Flickr photos. It also lets you tag, organize, comment on and manage those photos from your desktop.