BeatMix - Enables Shuffle and Radio for multiple artists in Spotify
Pandora iMessage App - Say it with Pandora — Send and receive songs in iMessage
Playlist Machinery - Tools that help you create & organize your Spotify playlists
YouTube Music - YouTube Music is a streaming app primarily designed for Android and iOS mobile devices. The app lets individuals search for music from their favorite artists, enjoy playlists, and access 30 million musical tracks.
Slackbox - Spotify playlist collaboration through Slack
Spotify - Map shows when two people play same song at same time