iSing Karaoke - iSing Karaoke is free to use the Karaoke app that offers free access to hundreds of songs.
Songlio - Free musical guessing game: race friends to name that tune
Sing! Karaoke by Smule - Karaoke with your favorite celebrity singers
Rock On! - A song pop adventure - music trivia awesomeness
Singa - Singa is the best way to sing karaoke on mobile or tablet.
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.