Voltage Modular is a free VST/AU virtual “modular case” for macOS and Windows compatible with most DAWs. It also runs as a Stand-Alone soft-synth.

Developers can freely design and publish modules with the equally free Voltage Modular Designer, and there’s a bunch of both free and paid modules available from a range of DYI as well as more established vendors.

The PSP Classics Modular Collection classic effects modules based on Cherry Audio’s extensive experience in developing high quality bread and butter effects and processor plug-ins.