Trivia for Google Chat - Team-building w/ fun quizzes, games right inside Google Chat
Songlio - Free musical guessing game: race friends to name that tune
Kosy Office - Kosy is a virtual space for remote teams to work and hang out.
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.
Infinite Music Trivia - How much do you know about music?
SongPop - The world's biggest music trivia game. Now even better.