Sing! Karaoke by Smule - Karaoke with your favorite celebrity singers
UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
iSing Karaoke - iSing Karaoke is free to use the Karaoke app that offers free access to hundreds of songs.
Yokee - Karaoke to YouTube videos
Singa - Singa is the best way to sing karaoke on mobile or tablet.
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!