x42-Autotune - An autotune implementation in x42 plugin pack
GSnap - With GSnap you can get an auto-tune effect.
Celemony Melodyne - Celemony Melodyne is the perfect quick and easy tool for all your tuning needs.
Revoice Pro - Revoice Pro is an audio plugin used for vocal tuning, time correction and ADR.
CrispyTuner - Fully featured vocal tuning suite.
Voloco - Auto-tune made simple and funny for everyone