Kingfisher - Organize and explain just about anything.
Spotify - Map shows when two people play same song at same time
Vidpulse - Analytics and recommendations for all videos on your site
SoundCloud - Enjoy music & follow favourite artists
Explained Visually - An experiment in making hard ideas intuitive.
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