Revoice Pro - Revoice Pro is an audio plugin used for vocal tuning, time correction and ADR.
x42-Autotune - An autotune implementation in x42 plugin pack
Celemony Melodyne - Celemony Melodyne is the perfect quick and easy tool for all your tuning needs.
Voxal - Modify your voice in any application that uses a microphone. From girl to alien, the voice options for online video games, avatars and podcasts are limitless.
CrispyTuner - Fully featured vocal tuning suite.
Voloco - Auto-tune made simple and funny for everyone