GSnap - With GSnap you can get an auto-tune effect.
FL Studio - Image-Line's FL Studio, now on it's 12th version, is a well-known music production suite and the most popular beat processor on the market, due no doubt to its longevity. Read more about FL Studio.
Revoice Pro - Revoice Pro is an audio plugin used for vocal tuning, time correction and ADR.
GarageBand - GarageBand is a fully equipped music creation studio for Mac
Celemony Melodyne - Celemony Melodyne is the perfect quick and easy tool for all your tuning needs.
Cubase - Cubase is one of the world’s most powerful music creation software packages. From first idea to finished recording, Cubase helps you to make outstanding music.