TSDJ (Twenty Second DJ) - Make a playlist w/ friends in 20 seconds.
musiqpad - Musiqpad is a social-music software platform for users to host their own ‘pads’ (rooms).
Join My Playlist - Listen to music live together with your friends in Spotify.
üWave - üWave is a self-hosted collaborative listening platform.
Jelly Party - Watch anything together.
Twinjack - Stream Spotify music with anyone with just a link