Vinyls - Vinyls is a music player that lets you listen to your music without any complicated setup.
Spotify - Map shows when two people play same song at same time
Poolside FM for iPhone - A pool party in your pocket
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
Lofi Radio Desktop - Lofi Hip Hop radio stream for Mac & PC
SoundCloud - Enjoy music & follow favourite artists