Heartbeat - Listen to music with your friends together, on Spotify
Playmoss - Create playlists from YouTube, Vimeo and SoundCloud
Liyo - Stream your favorite music live with friends 🎶
podsync - Simple and free service that lets you listen to any YouTube or Vimeo channels, playlists or user videos in podcast format
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
Audioship - Upload audio to YouTube or Facebook