KiCAD

https://www.chipmaker.ru/topic/170155/

https://sourceforge.net/projects/kicadcgi/

http://smisioto.no-ip.org/elettronica/kicad/kicad-en.htm

https://habr.com/ru/articles/197582/

https://github.com/emb-lib/kicad-lib

https://github.com/koteikaa/kicad-library

https://forum.cxem.net/index.php?/topic/206398-%D0%B3%D0%B4%D0%B5-%D0%B8%D1%81%D0%BA%D0%B0%D1%82%D1%8C-%D0%B1%D0%B8%D0%B1%D0%BB%D0%B8%D0%BE%D1%82%D0%B5%D0%BA%D0%B8-%D0%BA%D0%BE%D0%BC%D0%BF%D0%BE%D0%BD%D0%B5%D0%BD%D1%82%D0%BE%D0%B2-%D0%B4%D0%BB%D1%8F-kicad/