Yokee - Karaoke to YouTube videos
UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
Karaoke Player - KaraFun Player is the most advanced karaoke player: cool animations, pitch & tempo change, live effects, backing vocals...
Karaoke Mugen - Video & Movies and Audio & Music
Karaoke 5 - karaoke 5 software - Excellent Player and Creator of file Karaoke. Karaoke. Professional karaoke program. Free karaoke program.
OpenKJ - Open source cross platform karaoke hosting software