Puff it up. Push your sound.
This free saturation plug-in combines serious sound quality with a fun interface that invites experimentation. At the center of the plugin are three different sounding pufferfish that react visually as you push the saturation effect harder and harder.

Playful saturation with serious sound

Three characters for instant tone shaping

Free and easy-to-use

Home Page - https://www.sonible.com/pufferfish/