GSnap - With GSnap you can get an auto-tune effect.
Yokee - Karaoke to YouTube videos
Revoice Pro - Revoice Pro is an audio plugin used for vocal tuning, time correction and ADR.
UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
CrispyTuner - Fully featured vocal tuning suite.
Karaoke 5 - karaoke 5 software - Excellent Player and Creator of file Karaoke. Karaoke. Professional karaoke program. Free karaoke program.