Clownfish Voice Changer is an application for changing your voice. It's installed on system level so every application that uses microphone or other audio capture device will be affected. In general - your voice will be modified in Steam, Skype, Hangouts, ooVoo, Viber...
Voicemod is a Real Time Voice Changer for Discord, Skype, Twitch... with tons of awesome voices and effects. Made for Gamers & Streamers.
A program written in C# using the NAudio library that uses hotkeys to play sounds into a chosen sound device. It is similar to EXP Soundboard, except that JN Soundboard is not as cross-platform as EXP, but, there are more features in JN than EXP.