本文主要介绍Linux系统平台可以使用的CAD/CAM软件，对于比较难用或实在不怎么样的就不做介绍了：）
不仅有免费/开源的，也有专业商用的CAD/CAM系统哦。
1. QCAD
官方网站：www.qcad.org
支持系统：
Windows XP,2000,Vista
Mac OS X 10.3 (Panther, PPC) 和 10.4 (Tiger, PPC 和 Intel)
Linux 所有32bit x86分发版本
界面语言：多国语言（含中文）
界面预览：Screenshots
QCAD 是一个两维计算机辅助制图应用程序。利用 QCAD，您可以绘制技术图纸，如建筑平面图、内部平面图、机械零件平面图或轮廓略图等。
QCAD is an application for computer aided drafting in two dimensions (2d). With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schemas and diagrams. QCAD works on Windows, Mac OS X and many Linux and Unix Systems. The source code of the QCAD community edition is released under the GPL (Open Source).
2.FreeCAD
官方网站：http://free-cad.sourceforge.net/
系统支持：Windows/Linux
界面预览：Screenshot
是一个基于OpenCASCADE的开源CAD/CAE工具。 OpenCASCADE是一套开源的CAD/CAM/CAE几何模型核心
FreeCAD is an Open Source CAx RAD based on OpenCasCade, QT and Python. It features some key concepts like Macro recording, Workbenches, ability to run as a server and dynamically loadable Application extensions and its designed to be platform independent…
3.VariCAD
官方网站：www.varicad.com
系统支持：Windows and Linux
界面语言：English/German
VariCAD 是应用于机器引擎研发的CAD（计算机辅助设计）精密绘图软件，若您想研发特殊的工业产品或帮别人绘制产品3D绘图，那您就千万别错过这套好用的CAD精密绘图软件，它能使你的绘图工作更快速更精准，让您比别人更能快速的研发您的新产品！
VariCAD – designing has never been easier!
VariCAD is a 3D/2D CAD system for mechanical engineering. In addition to standard tools for 3D modeling and 2D drafting, the CAD system provides support for parameters and geometric constraints, tools for shells, pipelines, sheet metal unbending and crash tests, assembly support, libraries of standard mechanical parts (ANSI, DIN) and symbols, mechanical part calculations and tools for working with bills of materials (BOM) and title blocks. VariCAD supports STEP, STL, IGES, DWG and DXF file formats.
The comprehensive CAD software enables designers to quickly create, evaluate, and modify their models. It is compact, fast, easy to use, and provides everything one needs for mechanical design. The CAD system is sold “fully loaded”, including all features and functions, for one affordable price.
4.PythonCAD
官方网站：www.pythoncad.org
系统支持：Linux
界面语言：English
界面预览：Screenshots
一个基于Python写出的CAD系统。
PythonCAD is a CAD package written, surprisingly enough, in Python. The PythonCAD project aims to produce a scriptable, open-source, easy to use CAD package for Linux, the various flavors of BSD Unix, commercial Unix, and other platforms to which someone who is interested ports the program.
更多请访问：Linux Online CAD/CAM软件库页面