UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
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!
OpenKJ - Open source cross platform karaoke hosting software
KJams - KJams is a free app offering the largest selection of karaoke tracks in one easy-to-use place.
Karaoke 5 - karaoke 5 software - Excellent Player and Creator of file Karaoke. Karaoke. Professional karaoke program. Free karaoke program.
Walaoke - Walaoke is the app that makes it fun to sing karaoke anytime, anywhere.