G-code Generator/Simulator and EasyCommand
http://home.opentown.net/~cjhjh/Index.html

GDL Technology
The GDL Object Adapter works in AutoCAD LT, R14, 2000, 2000i and ADT. A restricted version for FREE Download!
http://www.gdltechnology.com/

GDM Software
http://www.gdmsoft.com/

Gecko Software
We provide high quality topographic map products for CAD and GIS.
http://www.gecko-sw.com/

General CADD Pro
General CADD Pro 2D - New Windows CADD, featuring 32 bit accuracy, 2 letter commands, DWG, DXF, CMP, MCR, GCD file compatibility, fast, accurate and affordable! Demo download and manual available at web site.
http://www.generalcadd.com

Geo Job Source
http://www.geojobsource.com/

Geosurface Technologies
Software for Land Surveyors, Engineers and GIS Professionals
http://geosurfacetech.com

GeoVect - GIS Map Conversions
GeoVect specializes in the conversion of paper or raster maps into vector data for your GIS, CAD or scientific analysis application.
http://www.geovect.com

Ghost 3D

http://www.ghost3d.com

Gibbs

http://www.gibbscam.com/

GIS Connection
Dedicated to connecting the GIS job seeker and employer, the best possible resource on the internet.
http://www.gisconnection.com/

GIS.com
GIS.com is a portal to GIS information on the Web and was created by ESRI, a GIS software developer.
http://www.gis.com

GIS\Solutions
Providing premier environmental data management systems and services that simplify the process of analysis, visualization and compliance reporting.
http://www.giskey.com/

GISCafe.com

http://www.giscafe.com/

GISjobs.com

http://www.gisjobs.com

GISuser.com
GISuser is a complete resource with daily updates of news, aarticles, careers, rfps, data pointers and a weekly newsletter.
http://www.gisuser.com

GiveMePower
PowerCAD CE - A World First
http://www.givemepower.com/

GlobadCAD

http://www.globalcad.com

GlobalSpec - The Engineering Search Engine
GlobalSpec, Inc. is the leading specialized information resource for the engineering community. Engineers and technical buyers regularly use GlobalSpec in their work process to search for and locate products and services, learn about suppliers and access comprehensive technical content on standards, patents, materials properties, specifications, designs, application notes and more.
http://www.globalspec.com

GO Cam
CAD/CAM software on-line : milling, turning and wire EDM
http://www.go-cam.com

GoEngineer
GoEngineer is the leading SolidWorks reseller in the Western United States. Backed by more than 20 years of performance,
http://www.goengineer.com/

Goodheart-Willcox Publisher

http://www.goodheartwillcox.com/

GoSteel 3
Application for drawing STEEL constructions.
http://www.gosteel.cz

Govert's Tools

http://www.output.tmfweb.nl/

GrafiCalc
GrafiCalc is breakthrough software that allows Autodesk Inventor series users to analyze and optimize product performance in the early stages of design – while conflicts are easier to detect and less expensive to fix.
http://www.graficalc.com

Graphic Solutions For Engineering

http://www.gsfeng.com

Greater Boston Autodesk Users Group

http://www.gbaug.org/

Greater Chicago AutoCAD Users Group

http://gcaug.com/

Greater Houston AutoCAD Users Group

http://www.ghaug.org/

Greater Pittsburgh Autocad Users Group

http://www.gpaug.org/

GTCO Calcomp Peripherals
Professional Productivity Tools.
http://www.gtcocalcomp.com/

GTX
With GTXScanClean for Engineering you can AUTOMATICALLY clean up your scanned images
http://www.gtx.com/

Guthrie CAD/GIS Software

http://www.guthcad.com.au

Cad Blog