Voice Changer can make your voice deeper, make your voice sound like a girl/guy, change and distort your voice so it's anonymous, make you voice sound like a robot, darth vader, a monster, and a tonne of other - best of all, Voice Changer is free!
Drag the "↕" icon to re-order them. Effects are applied to the audio in top-to-bottom order. Click the value next to a slider to add your own specific value that's outside of the slider's range. You are free to use the generated audio for any purpose at all, including commercially.