QCAD - The Open Source 2D CAD. QCAD is a cross-platform CAD solution for Windows, macOS and Linux. It supports the DXF format and optionally the DWG format (through a proprietary plugin).

高效的板材切割优化系统是专门针对裁板开料而设计的排样优化系统，解决企业裁板开料问题，能自动完成零件优化排样和规划下料，最大限度节约人工、加快生产周期和提高材料利用率。

Python 2D parametric DXF rendering CAD engine

QCAD plugins for laser cutting

My various QCad script extensions.

DXF CAD files and templates that I used to use

QCAD drawings

A desk project I made using Alibre Atom3D and QCAD