Aegean Music has announced that Pitchproof 1.0 has been released.
This plug-in provides pitch shifting effects that can be wet or combined with the dry signal. The effect is meant to combine old styles of pitch shifting with the quality you expect from modern plug-ins. It is basically a guitar harmonizer simulation that has most of what is great about guitar harmonizer pedals, and still preserves the signal's integrity.
You can select pitches like +7 or -7, or harmonies. These harmonies intelligently shift pitch to harmonize with the note you play. The plug-in works best with signals that are not polyphonic, but is suitable for guitar solos and such.
This is a free VST plugin and has Windows 32- and 64-bit versions.
You can find downloads and an audio demo on this page.