Subsonic - Subsonic is a free, web-based media streamer, providing ubiquitous access to your music and video.
Spotify - Map shows when two people play same song at same time
Daphile - Daphile is an audiophile class music server & player OS – targeted to dedicated headless PC.
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
Logitech Media Server - Logitech Media Server is the server software that powers audio players from Logitech (formerly...
SoundCloud - Enjoy music & follow favourite artists