An free audio multi pitch shifter plugin which you control via MIDI from MV´s Plugins. Download.
More specs:
Reliable ASDF pitch tracker with voiced/unvoiced recognition
Pitch tracking indicator
Separate processing of voiced vs. unvoiced input, thereby preserving a natural, intelligible sound
Voiced input will be re-pitched according to the keys pressed
Octave, semitone and fine tunig controls
Built-in noise gate with indicator
Built-in soft knee limiter with color-coded LED indicator
Built-in stereo reverb with controls for room size, damping, stereo width and dry/wet mix,
Master volume control with output clipping indicator
Effects may also be used without MIDI input
Option of VST plugin or stand-alone executable