DraftView  
   Direct viewing of Computervision CADDS, Personal Designer, AutoCAD DWG, DXF, HPGL, CALS, CGM and other file formats.
   http://www.draftware.com/

Actify, Inc.  
   The Spinfire 3D CAD viewer allows users to view, share, dimension, cross-section, and annotate 3D files from most common formats.
   http://www.actify.com/

Preview  
   PostScript viewer and converter for Windows.
   http://www.lib-sys.com/

Pangaea CAD Solutions  
   Gives MicroStation or AutoCad uses the ability to view, edit and redline your CAD files, .DGN .DWG, with support for image fils.
   http://www.pcscad.com/

Trix DrawingCenter  
   Viewing, mark up, measurement and printer controls for DWG, DXF, HPGL and CalComp vector files plus over fifty raster file formats.
   http://www.trixsystems.com/dcenter.html

Slick for Windows  
   View and print a large number of vector and raster file formats. Includes raster conversion, redlining, and database for file notes and tracking.
   http://www.slickwin.com/

Cimmetry Systems Inc.  
   Develops the AutoVue family of programs to view and markup 2D/3D CAD and office formats. A thin/thick-client CAD viewer integrates with ERP, PLM, and document management systems.
   http://www.cimmetry.com/

Dr. Dwg., Inc.  
   Suite of products for viewing AutoCAD drawings online and offline, with redlining and hyperlink capabilities.
   http://www.drdwg.com/

Cyco Software  
   AutoManager View - view, print and compare all your CAD and office documents in a single environment.
   http://www.cyco.com/amview/index.html

Informative Graphics Corporation  
   Viewing and markup software for a variety of document formats, drawings and images, including Java-based Web viewing, markup and collaboration.
   http://www.infograph.com/

CADlook  
   File viewer, inspector, and translator software for IGES, STEP, VDA-FS, and NC G-code data.
   http://www.cadlook.com/

CADViewer Pro  
   A viewer for AutoCAD Drawing Web Format (DWF) and SVF, for redlining CAD drawings on any client platform via a web and Java based interface.
   http://www.cadviewer.com/

Software Companions  
   Viewers and converters for HPGL, Gerber, and Excellon files, with an ActiveX Control version.
   http://www.softwarecompanions.com/

Allegria Software  
   Programs for review, comparison and markup of a variety of CAD formats, online and standalone, as well as graphics file conversion, and plot management.
   http://www.allegria.com/

C2C Technologies, Inc.  
   offers the 3D CAD viewing software SolidView, supporting the most common geometry file formats.
   http://www.cadcommunications.com/

CAD Viewer  
   Viewer that supports all DXF/DWG, HPGL, HPGL/2, JPG, and TIF files, even within ZIP archives, and allows to print them.
   http://www.guthcad.com.au/viewer.htm

Etecad File Manager  
   Software for managing CAD and Image file archives, with directory thumbnail preview, viewing and printing of popoular file formats.
   http://www.etecad.com/

IGES Toolbox  
   A CAD file viewer that reads, displays, and prints IGES format data files.
   http://www.igestoolbox.com/

FPLOT  
   A HPGL/2 interpreter software, that can be used to view and print plot files, or as a plotter driver for other programs.
   http://www.fplot.com/

Materialise Software: Magics Communicator  
   On-line conferencing over the internet, with 3D CAD visualisation, measuring, annotation, and 3D CAD file sharing in IGES, VRML, VDA and 3D DXF files formats
   http://www.materialise.com/mt.asp?mp=cm_main

Volo View  
   Autodesk's web-enabled review and markup tool for engineering data, working with the DWG, DXF, DWF, and Inventor formats.
   http://www.autodesk.com/voloview

Spicer Corporation  
   Viewing and markup software for 2D/3D CAD, raster, and office file formats, with API for integration other software systems.
   http://www.spicer.com/

Rasterex  
   Multi format viewers with markup and collaboration facilities, raster editing software, and related developer tools.
   http://www.rasterex.com/

iTwinView  
   An online service for viewing CAD files in your web browser through a Java applet, as well as software for file viewing and conversion.
   http://www.cad2dtp.com/

IC CAD  
   A simple program for viewing and printing CAD files from the AutoCAD and Microstation formats.
   http://www.iccad.ca/

PloView  
   Displays HPGL/HPGL2 graphic files, with output to printers and plotters, and PDF, DXF, TIFF, JPEG, and BITMAP files. Also allows text search and measurement of distances.
   http://homepage2.nifty.com/ploview/ehp.htm

equivaQ Software  
   A HP-HL/2 plot filew viewer and print queue manager for Windows, that also exports data to several other formats.
   http://www.equivaq.com/

NavisWorks, Ltd.  
   NavisWorks is a design review solution that allows to view and coordinate 3D models.
   http://www.navisworks.com/

Lx-Viewer  
   An Open Source program that allows to open, view, print and convert DWG or DXF files up to version 2002 on the Linux platform.
   http://lx-viewer.sourceforge.net/