Wolf Shaper is a free VST, LV2 and CLAP distortion plugin.
It lets you create your own waveshaping functions using a spline-based graph editor.
Customizable graph – Design your own distortion functions using 4 different curve types.
Warp modes – Use warping algorithms to alter the graph dynamically.
Uni/Bi modes – Switch between symmetrical and asymmetrical distortion.
Up to 16x oversampling – Get rid of aliasing artifacts for a cleaner sound.