GSnap - With GSnap you can get an auto-tune effect.
Clownfish Voice Changer - Clownfish Voice Changer is multiple voice changing software for various chatting and gaming platforms.
Celemony Melodyne - Celemony Melodyne is the perfect quick and easy tool for all your tuning needs.
Soundpad - Play sounds in voice chats in high digital quality.
Antares Auto-Tune Pro - Auto-Tune Pro by Antares is the latest and enhanced version of Auto-Tune that offers Auto Mode to correct pitch and Graph Mode for step-by-step modifications of time and pitch.
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.