网址:https://www.partsim.com/
网址:https://easyeda.com/
网址:https://www.autodesk.com.cn/solutions/circuit-design-software
官网:https://www.rs-online.com/designspark/pcb-software
网址:https://www.kicad.org/
网址:freecadweb.org/
网址:qcad.org/en/
官网:implicitcad.org/
官网:openscad.org