FreeCad
FreeCAD 是一款开源的3D CAD（计算机辅助设计）建模工具，适用于工程、建筑、产品设计等领域。它非常灵活，支持多种插件和扩展。
主要功能：
- 3D建模和参数化设计
- 支持多种设计模块，如建筑设计、机械设计等
- 可自定义脚本和插件扩展功能
- 支持STL、STEP、IGES等多种文件格式导入导出
FreeCAD is an open-source 3D CAD (Computer-Aided Design) modeling tool used in fields like engineering, architecture, and product design. It is highly flexible and supports various plugins and extensions.
Main Features:
- 3D modeling and parametric design
- Supports multiple design modules, such as architectural and mechanical design
- Customizable scripting and plugin extension capabilities
- Supports import/export of various file formats like STL, STEP, IGES