Aegean Music

1. PitchProof - a classic pitch shifter / harmonizer.
2. Doppler Dome - a doppler effect simulator.

http://aegeanmusic.com/

Pitch

GSnap is an auto-tune effect. It can be used subtly to correct the pitch of a vocal, or, with more extreme settings, to create a robot-voice effect.


http://www.gvst.co.uk/gsnap.htm

KeroVee is a Pitch-Correction plug-in that works as a VST effect. It can pitch-detect and retune to specified scales or MIDI notes. 'Bypass' and 'SubTone' mix are also available.


http://www.g200kg.com/en/software/



Son of a Pitch 1.1
The pitch of the incoming signal is controllable via the pitch knob or by a sync to host LFO. The pitch knob ranges from +3 octaves to -3 octaves of the original pitch. The effect also features an LFO controlled filter section. There are 3 filters to choose from, 2 SV filters and a butterworth filter. The filter section can be bypassed sending the dry signal straight to the pitch bender.

http://downloads.fyxm.net/Son-of-36802.html

De La Mancha - unstable

unstable likes to mess around with your audio pitch, with 3 subtle pitch modulation modes to simulate the unpredictable but lovable pitch instability of an old tape machine or an analogue synth. It doesn’t only do subtle though, you can also put it in ‘insane’ mode if you’d rather just FSU



http://delamanchavst.wordpress.com/2014/06/20/unstable-pitch-modulation-vst-is-released-for-free/