Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Parallel - Listen to music with friends over Spotify at the same time
üWave - üWave is a self-hosted collaborative listening platform.
aux.app - A free web-based music platform to play music from other popular online streaming services.
musiqpad - Musiqpad is a social-music software platform for users to host their own ‘pads’ (rooms).