TAL-Vocoder - Vintage vocoder emulation plugin in VST and Audio Unit format.
Voicemod - What are the voice changers? How do these work? Are these illegal? What is a soundboard? Find all the answers here. Voicemod - The Best FREE Voice Changer
ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
Clownfish Voice Changer - Clownfish Voice Changer is multiple voice changing software for various chatting and gaming platforms.
Voloco - Auto-tune made simple and funny for everyone
MorphVOX - MorphVOX is universal voice changing software that is integrated with the functions of sound effects and background tracks.