Partyhero - Pass your friends the aux!
Mixxx - The most powerful free DJ software in the world.
Heartbeat - Listen to music with your friends together, on Spotify
VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs
TuneMeet - Chat with people who are listening to the same song
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.