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
x42-Autotune - An autotune implementation in x42 plugin pack
Clownfish Voice Changer - Clownfish Voice Changer is multiple voice changing software for various chatting and gaming platforms.
Celemony Melodyne - Celemony Melodyne is the perfect quick and easy tool for all your tuning needs.
GSnap - With GSnap you can get an auto-tune effect.
CrispyTuner - Fully featured vocal tuning suite.