Reason Studios has just added a Reason stamped version of the famous auto-tune software in the form of a native plug-in for the Rack Extension.
Auto-Tune Reason allows you to find the pitch-shifting algorithms of the original software, with in addition CV and Gate inputs and outputs, an output for the envelope follower and stereo inputs and outputs, as well as Combinators for voice processing.

The Auto-Tune Reason Rack Extension is sold for € 109 at www.reasonstudios.com , you can also download a 30-day trial version.