Voice changing software for online games, VoIP, and the multimedia. MorphVOX Pro Voice sets new standards for voice morphing. MorphVOX Pro is optimized for online games, but is also is great for talking via instant messaging and VoIP. Advance features include file morphing and record to file for quality voice-overs. The new version sports an enhanced professional user interface, extended file format support and an extensible plug-in architecture

Vodi is a tool for modifying pitch, timbre, duration and adding audio effects. Vodi supports independent pitch and timbre modification in the real sense as opposed to other software tools for voice modification: You can hold the pitch constant and modify the timbre and vice versa, or you can modify them independently in desired amounts. Changing the pitch results in a voice that sounds in a different tone as compared to the original.

IPi Phone is internet IP to IP telephone software that allows you to talk and use
text chat. IPi Phone is easy to use. All you need to know is the other person IP address
and you can connect to them and start talking over the internet for free.
You can use secure communication and voice modification.
It allows you to keep your privacy and stay anonymous.
Communication can be encrypted with AES (160 bit key length).