On the internet there is such a thing as a free lunch and it comes in the form of free voice changer software.

the upside is that you can do all the usual voice morphing or distorting tasks, but the downside is that you get lmited features.

As ive mentioned before on the voice changer site, we are publishinga free software package called a1.0 voice changer software. It will have similar functionality to the AV VCS Voice Changer software.

things like:
- x and y axis drag button to change pitch and timbre.
- voice recording features
- and the ability to use it for things like chat on msn and yahoo

but for the meantime if you want free voice changer software then you should have a  look at

- funnyvoice : basic voice changing program which changes your pitch step by step
ref : http://www.download.com/Funny-Voice/3000-2133_4-8723947.html?tag=lst-0-3

- audacity  : really useful audio editing program, its opensource and great for changing audio clips. its not so good for live audio outputting, but excellent if you wan to use it for subtle voice changing.
ref: http://audacity.sourceforge.net/