Clownfish Voice Changer - Clownfish Voice Changer is multiple voice changing software for various chatting and gaming platforms.
Voxal - Modify your voice in any application that uses a microphone. From girl to alien, the voice options for online video games, avatars and podcasts are limitless.
JN Soundboard - An open-source hotkey soundboard program
EXP Soundboard - A soundboard that supports almost all MP3s and WAVs.
Resanance - THE FREE SOUNDBOARD SOFTWARE
MorphVOX Junior - MorphVOX Junior is a free voice changer software app for Windows. Although it's designed for online games, you can use it for any purpose that requires voice