Printed circuit boards designed in KiCad and published on GitHub, each with its parts, layers and size, its README and its files; open any of them in PCBKit.
bitomaxsp/rs-ttl
RS232 to TTL converter
bitomaxsp/UNOvx
Arduino-like ATMega328 board
bitomaxsp/rca-wv98c
RCA WV98C schematic and PCB in KiCAD