MadMapper - The Mapping Software
GSnap - With GSnap you can get an auto-tune effect.
Resolume - Resolume is an application for live video performances.
Revoice Pro - Revoice Pro is an audio plugin used for vocal tuning, time correction and ADR.
Linux Show Player - Sound player designed for stage productions
Celemony Melodyne - Celemony Melodyne is the perfect quick and easy tool for all your tuning needs.