https://www.intellicad.org/
Alternative CAD Platform | IntelliCAD Technology Consortium
IntelliCAD is the best .dwg compatible alternative CAD platform for application developers. Cooperative CAD Development Platform.
cad platformalternativeintellicadtechnologyconsortium
https://github.com/LibreCAD/LibreCAD/
GitHub - LibreCAD/LibreCAD: LibreCAD is a cross-platform 2D CAD program. It can read DXF and write...
LibreCAD is a cross-platform 2D CAD program. It can read DXF and write DXF/PDF/SVG files, with basic support for DWG reading. It supports...