Relax And Enjoy This Simple Drone Synthesizer | Hackaday
KOMA Elektronik and COMMON GROUND announces Anglerfish Drone Synth DIY Kit - Gearjunkies - Music tech news, Reviews, Videos, Synthesizers, Studio, Recording
Leaf Audio Drone Synth, DIY Kit - Control Voltage
Atari Goth Console - DIY Drone Synth Kit from CCTV on Tindie
Neutral Labs Elmyra Is A DIY Drone Synth Inspired By The Lyra-8
I posted some custom PCBs for a drone synth recently, here is the demo! : r/synthdiy
DIY Sound and Light Synthesizer: The Nova Drone
Krischer MicroQuad, affordable 4-voice DIY analog drone synth