Songlio - Free musical guessing game: race friends to name that tune
Spotify - Map shows when two people play same song at same time
SongTrivia2.io - Songtrivia2.io is a browser and mobile blind test game that allows you to play in real time with your friends or against strangers. Several musical themes, difficulty and game modes are available to create lots of different musical quizzes.
SOUNDS - Discover music with friends
Rock On! - A song pop adventure - music trivia awesomeness
Songlink - Share music with anyone.