Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
Youtube-DJ - Mix YouTube songs together
Twinjack - Stream Spotify music with anyone with just a link
Edjing - Discover edjing and edjing Pro, the most powerful DJ apps for music lovers! Mix on Android, Windows and iOS devices and record then share your DJ sets!
Parallel - Listen to music with friends over Spotify at the same time
YOU.DJ - Mix SoundCloud music and Youtube videos live in your browser.