Ultra-low-cost robotic joint: a $1.5 FOC board inside a 1503 gimbal motor, plus a 3D-printed high-ratio precision gearbox. Cheap power, exact motion.
Faze4: open-source 3D-printed 6-axis robot arm with cycloidal gearboxes and the wiring inside the arm, the files to build it.
A hand-wired, 3D-printed ESP32-S3 macropad that mimics the Codex Micro - built in a weekend. Yes, it has RGB.