Open-source boards designed in KiCad by NotARealDevOrDesigner on GitHub, from 4 repositories. A board’s address here is its repository’s there.
NotARealDevOrDesigner/rs1_pcb_addon
NotARealDevOrDesigner/rs1_pcb_back
NotARealDevOrDesigner/rs1_pcb
NotARealDevOrDesigner/time_cap_pcb