Spotify - Map shows when two people play same song at same time
MP3Juices - MP3Juices is a free mp3 search engine and tool that allows you to download unlimited mp3 files anywhere around the world.
SoundCloud - Enjoy music & follow favourite artists
MP3Clan - MP3Clan is a popular web-based application that allows you to enjoy and download unlimited audio songs anytime anywhere.
Ampache - Web ( HTTP centralized ) based audio/video streaming application
Lidarr - Lidarr is a music collection manager for downloading and organizing music libraries.