CAD 2002  
   Drafting software for 2D design on Windows, with a free demo for download after registration [requires Java for navigation].
   http://www.cad2002.com/

JustCad  
   A 2D CAD program for Windows, distributed as shareware.
   http://justcad.com/

ProCAD+  
   A computer aided 2D drawing program for Acorn RISC OS computers.
   http://www.dsnell.zynet.co.uk/CADindex.html

CadStd  
   A drafting program for Windows, with a free lite version.
   http://www.cadstd.com/

Accucadd  
   A Windows drafting program, the successor to the DOS based RoboCAD.
   http://www.accucadd.com/

Malz++Kassner GmbH  
   CAD 5 drafting software for Windows, with plug-ins to support DXF, DWG, HPGL/2 and SVG file formats.
   http://www.malz-kassner.com/

Pressure Vessel Drafting Guide  
   Detailed instructions on how do design and draft pressure vessels with AutoCAD, with examples.
   http://www.geocities.com/ww_chew/pvdrafting/pvd-frame.htm

Dexterpen  
   A parametric drawing and calculating utility, for creating diagrams of variable geometry objects. Writes DXF files and copies to office applications.
   http://www.ransen.com/dexterpen/

General CADD Products, Inc.  
   About the General CADD Pro 2D Windows CAD program, with user forums and a downloadable manual.
   http://www.generalcadd.com/

VectorEngineer  
   A multi-purpose 2D CAD system for technical drawings, designs, and isometric visualizations. A free version is available for download.
   http://www.vectorengineer.com/

CAD Schroer GmbH  
   Manufacturer and vendor of the MEDUSA parametric 2D CAD system, and several application specific extensions.
   http://www.cad-schroer.com/

Delta Software international  
   CAD Pro is a drafting and design software with engineering precision and adaptive tools.
   http://www.cadprosoftware.com/

ZiPCAD  
   A drafting program for Palm OS handheld computers, with DXF file export.
   http://www.zipcad.com/

TigerCad  
   Budget 2D CAD software for mechanical, architectural and diagrams.
   http://www.tigercad.com/

Delta Cad  
   A 2D CAD software designed to be easy to use.
   http://www.deltacad.com/

QCad  
   A 2D CAD system for Linux, Unix Systems, Mac OS X and Windows, released as Open Source for unix based systems.
   http://www.ribbonsoft.com/qcad.html