Free Vocoder VSTi - Vocov

While it's still an early release, the free Vocov vocoder VSTi still sounds capable of some cool effects.

As well as more technical notes on Vocov, their website also gives a brief summary of its usage:

1. Simple usage (if modulator source is not so long wav file)
Load "VOCOV.dll" to your host app as a VSTi.
Load .wav file to VOCOV VSTi and select.
(wav file should be a LPCM/ 8 or 16 bits format)
You can control VOCOV as a synth via MIDI track.

2. Advanced usage (you can use a audio track as a modulator source)
Prepare audio track for modulator & midi track for carrier control.
Load "VOCOV.dll" to your host app as a VSTi controlled by MIDI track.
Insert "VOCOVCapture.dll" to audio track.
Select VSTi's modulator source to "from VOCOV Capture".

Attached are some sample MP3s made with the Vocov vocoder VSTi

You can download Vocov from their website.