Trigon

Trigon is a VST plug-in that offers a combination of a waveshaper and wavefolder. Signals are put through three stages of processing, each offering a wavefolder (controlled by the "Drive" knob) and applying a trigonometric function (sine, cosine and tangens - alternatively, their respective arcus function can be applied) to it.

It's built using C++ and the Steinberg VST3 SDK.

I never open-sourced Trigon because I didn't really know to at the time, maybe someday I'll bother to publish the source code.