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