Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Pano Scrobbler - Scrobble to lastFM from anything which produces audio with metadata, including video streaming...
Maloja - Simple self-hosted music scrobble database to create personal listening statistics.
Last.fm Scrobbler - Scrobble music all around the web!
Spotify - Map shows when two people play same song at same time
My Radio - My Radio is a free-to-use application that has been easing your way to listen to a wide range of radio from around the globe.