Aegean Music has released the free plug-in Pitchproof in Avid AAX Format making it compatible with Pro Tools for Windows and Mac OS X.
Pitchproof is a pitch shifter. The effect is meant to combine old styles of pitch shifting with the quality you expect from modern plug-ins. The result is this pitch "pedal" simulation that has most of what is great about guitar harmonizer pedals, and still preserves the signal's integrity (so long as it is monophonic).
This version is functionally the same as the other versions of Pitchproof but uses JUICE GUI.