HotMusic - HotMusic is the best music service to discover songs from your favourite genres RIGHT AFTER their...
Parallel - Listen to music with friends over Spotify at the same time
Tune My Music - Transfer Playlists Between Music Services
Slackbox - Spotify playlist collaboration through Slack
SoundCloud Charts - The most played tracks on SoundCloud this week
Join My Playlist - Listen to music live together with your friends in Spotify.