Freeware - Eventide New Fangled Audio Pendulate VSTi Plugin

https://www.eventideaudio.com/promo/pendulate

Introducing Pendulate, chaotic monosynth by Newfangled Audio. Pendulate uses a brand new oscillator design to produce sounds different from any other synth. It features a chaotic oscillator based on a double pendulum. What initially looks random actually contains underlying patterns of interconnectedness, constant feedback loops, repetition, self-similarity, fractals, and self-organization. When designing the Pendulate oscillator we took great care to bring out these underlying patterns. The result is an oscillator that can smoothly fade from a sine wave to total chaos, with an expanse of territory to explore in between.