Last.fm is a free music recommendation and internet radio service. Users download a small application which tracks which music you listen to, and uses this data to build a personalized radio station with recommended songs. Your listening statistics are also provided on the web site for use in forum signatures or personal web pages.

In addition to providing recommendations and radio, the Last.fm application shows track information, cover art, and an artist bio for each song that plays, as well as a list of similar artists. You can tag each song as it plays, and listen to radio stations with tracks others have tagged. In addition to tagging songs, users can join groups of those with similar interests, and Last.fm provides a group page with the listening statistics for the whole group, as well as group forums and a place to post journal entries relating to the music you listen to. With thousands of users, Last.fm is an excellent place to track, listen to, and discuss your favorite music!