GSnap - With GSnap you can get an auto-tune effect.
Aftertouch - Aftertouch – 3D MIDI Controller created and published by Kevin Nelson.
Revoice Pro - Revoice Pro is an audio plugin used for vocal tuning, time correction and ADR.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
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.
keezy - A colorful soundboard. Play with music.