For some time Klevgränd has been developing an audio effect development environment called KRETS. Initially it was made exclusively for internal use to prototype plugins and quickly test DSP ideas. Now they want to let real users try it out, aiming for the release of an official product.
Currently KRETS is in an alpha state; it works but parts of the functionality (and design) will most likely change. Klevgränd is making this alpha public to get suggestions for features and feedback about the whole idea.
KRETS is a plugin that works in any Audio Unit or VST compatible host on macOS or Windows. It requires an internet connection and a user account at klevgrand.se