Waves does offer a legitimate way to use the plugin for free, but it is limited.
MAutoPitch is a powerful automatic tuning plugin included in the Melda Free FX Bundle . Beyond basic pitch correction, it features a formant shifter (to change the "gender" or tone of the voice) and a stereo-width adjuster. It is incredibly stable and highly customizable. Resonant Cavity - Voloco waves tune realtime free download free