Graphic Foundry - High-impact audio reactive music visualizers 💎
Spotify - Map shows when two people play same song at same time
cmd.fm UI - Music visualized and controlled via a command line interface
SoundCloud - Enjoy music & follow favourite artists
SYQEL - Bring your music to life
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