Visual Studio: https://visualstudio.microsoft.com/ko/
KiCad: https://www.kicad.org/
OpenOffice: https://www.openoffice.org/
FreeCad: https://www.freecadweb.org/
LSIS: https://www.ls-electric.com/ko/
Misumi: https://kr.misumi-ec.com/
Mitsubishi: http://www.mitsubishi-automation.co.kr/