We've just been told about a new collection of modules from Pyer and Marc Boulé called Geodesics. They are inspired by astronomic events and physical theories, and while created for the free, virtual Eurorack modular environment VCVRack, they are also created to emulate true hardware - knobs and buttons, right click actions kept to a minimum, which does bring up and interesting concept of using VCVRack as a hardware prototyping system, but that's another topic.
And, like the VCVRack software , Geodesics are also free - just register and download.
There's a playlist of music in which Geodesic modules were used by a number of artists:
The philosophy of designing organismic instruments