UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
Rocksmith+ - Rocksmith builds off of the fundamentals of music games like Rock Band and Guitar Hero by offering fundamental lessons in actually playing guitar.
Yokee - Karaoke to YouTube videos
Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.
KaraFun - KaraFun is the best online karaoke. Over 35,000 karaoke songs, with studio quality, at home or on the go. Regular updates. Free demo!
World in Audition - World in Audition is an Addictive, Dancing and Music Simulation.