Prisma

multiband distortion plugin for advanced tone shaping.
up to four modules can be added to any one of the four bands.
as of writing, there are 21 modules available to choose from.
in the right hands the plugin can produce highly complex and intricate tones.
common usecases include very harsh distortions being applied on a narrow band to create more subtle effects,
and bass recordings being distorted on the higher frequencies without hurting the low end.
also included is a single band version called prismon.

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/