Aviate Audio Multiverse

Multiverse is an open development platform for audio effects. The Developer Edition product includes a software development kit (SDK) that makes it easy for developers to program completely custom effects (C++, C). Developers can publish their work for free, open source or for the price they choose and earn revenue from the sale of their effects. Player Edition users can access the effects from third party publishers and developers via the company website and build custom pedalboard style presets using the Multiverse Designer desktop app.

Web: aviateaudio.com