Fake Voice

Fake Voice is a very easy to use tool designed to change your voice using a number of highly customizable effects.
Installation is nothing special, but you're still advised to pay extra care to every single step, as the setup kit also offers to download and install a different piece of software that Fake Voice doesn't need to work properly.
The interface is quite basic and you need to adjust only a bunch of settings before changing your voice. By default, the main window lets you enable a robot or an echo effect, with multiple other settings available right in the main window.
For instance, you're allowed to adjust pitch, formant, base pitch and noise threshold, while the Echo effect section adds two more options, namely duration and strength.
As you can see, Fake Voice is a very easy to use application and it's hard to get confused when launching it. Still, if you need assistance with any of the aforementioned features, a help file is also available to answer your questions.
Obviously, Fake Voice runs on low resources and it takes just a few seconds to figure out how to use it. It has absolutely no problem to run on any Windows version on the market, remaining light on hardware resources all the time.
Overall, Fake Voice is the kind of software solution that may come in handy especially to beginners, as it offers a very easy to use environment, with minimum configuration options. Plus, it comprises a comprehensive help file to make sure rookies know here to start.