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!
Soundfont Midi Player - Full-featured MIDI and Karaoke player/router with built-in MIDI synth
PCDJ Karaoki - PCDJ KARAOKI is karaoke show hosting software designed for professional KJs.
vanBasco's Karaoke Player - vanBascos Karaoke Player plays MIDI Karaoke files. Lyrics can be displayed in full-screen.
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.