ModMan

modulation effect that produces organic and ever changing randomized movements, based on a perlin noise algorithm.
allows modulating a tape drift, low pass and its resonance, saturation, and amplitude.
with this effect you can add movement to a pad, widen the stereo field, create a tape style effect, or experiment with bizzare settings to create interesting textures.
its cool.

Free version includes a non-intrusive banner.
Available for mac, windows and linux, in AU, CLAP and VST3 formats, 64-bit only.
More info: https://vst.unplug.red/