Maneco Labs Grone Eurorack Drone Synth Module - Signal Sounds
Erica Synths Fusion Drone System Eurorack Modular Synthesizer | Sweetwater
GitHub - ErikOostveen/PlanetDrone: Planet Drone is an Open Source Raspberry PI Eurorack-Module project, which uses the SuperCollider platform to generate distinctive and captivating music drones.
Eurorack drone for a beginner - help! - MOD WIGGLER