Flickr is an online photo sharing and management application that allows users to upload and tag their photos. The document encourages attendees of the NCFR conference to upload their photos to Flickr and tag them with "ncfr08" to share with other attendees and have a chance to win a digital photo frame. It provides instructions on how to sign up for Flickr, upload photos, join the conference group, search for tagged photos, and add titles and tags to help identify other conference participants.