VisualVox VST(like autotune or v-vocal)
VisualVox VST is an intonation correction plugin.
With it you can:
* Shift notes of a voice recording to perfect intonation.
* Fit a voice recording into rhythm by stretching, cutting and moving parts of it.
* Fit a voice recording to another key with minimal pitch changes.
* Produce a perfect vibrato.
* Visualize how right or wrong you can sing.
* Create artificial polyphony from single voice recording.
* Design frequency curves freely with your mouse.
* Let the plugin improve intonation automatically.
http://www.kvraudio.com/get/2911.html