Spotify - Map shows when two people play same song at same time

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

Noon Pacific - The week’s best music handpicked & delivered to your devices

Playlist Machinery - Tools that help you create & organize your Spotify playlists

Apple Music - Apple Music app combines your personal iTunes library with Apple's music subscription service. Music you have purchased from the iTunes store, or synced over from other sources, is available in the "Library" tab. Read more about Apple Music.

Magic Playlist - Get the playlist of your dreams based on a song