Commercial Vendors:

• Sinclair Knight Merz Developer of ProVec, a raster to vector conversion software package and DeSKan Express, a unique large format desktop scanner for use in the CAD, GIS and AM/FM industries. Merged with Abakos Digital Images.
• Able Software Co. is a leading software developer for advanced image processing applications, including 3D image visualization, processing, rendering, raster to vector conversion for GIS, mapping and CAD data capture.
• A.C.T. GIS provides personal, consistent high quality, technically oriented, GIS consulting services.
• Advanced Visual Systems
• American Digital Cartography, Inc.
• Analytical Spectral Devices ASD is the leading global supplier of portable spectroscopic instrumentation. Tailored to applications in industrial analytical chemistry, optical remote sensing, oceanography, and plant physiology, these instruments cover the ultraviolet (UV), visible (Vis) and near infrared (NIR) wavelength ranges.
• Applied Geographic Solutions provides the industry's most comprehensive current year demographic estimates, five and ten year projections, consumer expenditure estimates, business locations, and the MOSAIC neighborhood segmentation system. Data is provided for all standard geographic levels including Block Group, Tract, and ZIP codes.
• Applied Geographics, Inc. is an environmental and geographic information systems (GIS) consulting firm.
• Applied GIS, Inc. uses state-of-the-art geographic information system (GIS) technology to generate a wide variety of maps to meet our clients needs.
• Argus Interware Inc. Geographic Information Models.
• Autodesk Inc. (GIS section)
• Avenza Software Inc. a Burlington, Ontario, Canada software developer has developed MAPublisher (TM), a unique suite of plug-in filters forAdobe Illustrator 6.0 & 5.5 for Macintosh. MAPublisher allows users to import Geographical Information System (GIS) data directly into Adobe Illustrator with all attributes intact and print high quality complex maps and spatial renderings right from the desktop to any PostScript (TM) output device.
• Blue Marble Geographics produces a number of map application software programs including a coordinate conversion program, GeoCalc.
• BOSS International develops and market a wide range of civil and environmental engineering software (hydrologic emphasis). European Site
• Caris Developers of CARIS GIS, CARIS Marine Information Systems, and the CARIS++ Spatial Framework. Explore the advantages that this software provides, from traditional GIS and desktop mapping, to GIS on the Internet and spatial components for corporate enterprise.
• Claritas, Inc. , "The Precision Marketing Source". What is Precision Marketing? It is the integration of demographics, specialized data, customer data, geography, mapping and marketing experience.
• Data Depot supplies a complete listing of demographic, marketing, and mapping data for the UK and Europe.
• DeLorme Mapping has online demos of their digital atlases and maps.
• EdgeTech America, Inc. is an ESRI Business Partner offering high-quality GIS products and services to private and governmental organizations.
• Environmental Systems Research Institute, Inc. (ESRI) site offers news, products publications, tech support, jobs, shopping, software, and various other links to information.
• Leica Geosystems Inc. mapping software company specializing in geographic imaging solutions.
• ESRI Canada Ltd. Official Canadian distributor of ESRI resources, including GIS products, training, support, partner program, user groups, free software, demos, etc.
• GeoCommunity a premier resource for GIS/CAD professionals. A must visit for FREE downloads from over a terabyte of geospatial datasets, a high-powered, industry-specific search engine, GIS industry news, discussion forums, classifieds, and software utilities.
• Geodynamic Solutions, Inc. provides enterprise and internet solutions that enable our clients to integrate, access, and analyze geographic information including petrolynx.com the petroleum industry ASP solution for online mapping, well and production analysis, and data extraction.
• GeoLytics Inc. is the leading provider of CD-ROM products that integrate a wealth of US Census, private and other government data with sophisticated statistical and mapping tools.
• GeoPlace.com : news, software reviews, publications.
• Geo/SQL Technologies Inc. Developers of Geo/SQL GIS Software; low cost Windows or AutoCAD based GIS tools.
• GIS Data Depot is a geographic data 'superstore' including formats such as DEM, DRG, DOQQ, satellite imagery, E00, SHP, MIF, DXF, DLG, etc.
• Golden Software makers of Surfer, Mapviewer, Grapher, and Didger.
• GSS Geomatics Information Center , Land Surveying Information Center, and Internet Resources
  
• ImageNet from Core Software Technology is a global visual indexing system providing access to a broad range of public and commercial geospatial data products.
• Intergraph Corporation
• Land Info Intl., LLC Map, DEM, and Imagery Store
• LizardTech Inc. LizardTech offers the most advanced image compression on the market today. Its image compression software, called MrSID (Multi-Resolution Seamless Image Database), was developed at Los Alamos National Laboratory.
• Magellan Systems Corp.
• Manifold.Net GIS software; GPS software; data available.
• Mapframe MapFrame develops smart simple solutions for field automation. The company's data collection application combines forms and text information with geographic data to provide a highly intelligent framework for data collection. With FieldSmart Collect, capturing data is as easy as selecting from lists, printing in fields, and placing objects on a map or sketch.
• Mapinfo Corp.
• Map Maker Ltd. makers of Map Maker Pro.
• Maptech, Inc. has a number of marine and land digital products including charts, navigators, plotting and contouring software etc.
• MetaMAP, Inc. Markets, develops, and supports MetaMAP Geographic Information System (GIS) software products, which run on Windows platform computers.
• MicroImages, Inc . The TNT products support fully integrated GIS, image processing, CAD, TIN, desktop cartography, and geospatial database management. With TNT you edit, display, and present project materials in raster, vector, CAD, and TIN formats.
• Northwest GIS Services , Inc. (NWGIS) has provided the Pacific Northwest with expert GIS technical support and mapping services since 1993. Specialize in watershed analysis, hydrology, and surface water planning and management.
• PCI Geomatics is a world leading developer of Geomatics software and solutions based on its remote sensing, digital photogrammetry, spatial analysis, and cartographic editing programs.
• Rand McNally & Company has a site with an Internet Directory including Tripmaker and StreetFinder as well as travel tools, and an online catalog.
• R&D Center ScanEx specializes in area of satellite remote sensing data acquisition and distribution and offers archived images from the Resurs-O1 satellite and the MOMS-2P camera onboard the MIR station.
• Scanex is a private Russian company providing full integrated solutions for satellite and remote sensing applications.
• Softree develops and markets high quality scientific and engineering software for applications in forestry and the natural resource industries. Quick and easy software for surveying and mapping. It is ideal for the geographer, forester, geologist, surveyor or resource scientist who is not a GIS specialist, but who needs to quickly produce working maps and site plans.
• Space Imaging collects and distributes a wide variety of satellite- and aerially-derived digital Earth information products from a variety of sources. These include a constellation of satellites lead by the flagship Landsat and Indian Remote Sensing satellites, from which Space Imaging produces tailored global space-based imagery and derivative information products.
• Spot Image Corp. Spot Image is the world's leading supplier of geographic information from optical and radar earth observation satellites, compatible with all image processing and GIS systems. Its range of products includes geocoded and orthorectified images, DEM, etc., and ad-hoc services.
• TatukGIS Home of the TatukGIS Developer Kernel, a comprehensive GIS development toolkit provided as both a Delphi/C++Builder VCL and an ActiveX component, and the Aerial Imagery Corrector, used to rectify, georeference, and mosaic aerial images and raster maps
• Thinkspace Inc. has released MFworks, a raster based GIS modeling and analysis package, for Windows 95/NT platform as well as the Macintosh platform.
• The TopoZone the Web's center for topographic map users and outdoor recreation enthusiasts. They have worked with the USGS to create the Web's first interactive topo map of the entire United States.
• Torpedo Software Geography and history game software.
• Zipinfo concentrates on ZIP code products

Other lists:

• HDM's Great GIS Net Sites

Software:

GIS Software and Demonstrations:

• GRASS is a public domain GIS used by many U.S. government agencies. It was developed by the U.S. Army Corps of Engineers for producing environmental impact statements.
• MicroDEM is a Windows NT or 95 package for displaying and merging DLGs, DEMs, other gridded data, and satellite imagery.
• The University of Hawaii School of Ocean and Earth Science and Technology has produced a mapping package called GMT (Generic Mapping Tools).
• AGIS for Windows is a mapping and simple GIS package specifically designed to be easy to use. The available 32 bit version is designed for Windows 95, 98 and NT.
• InFoCAD GIS Pro is a COGO-based GIS software that combines imaging, graphics, database, and analysis functions into one package.
• ArrayTran by Hazel's Country Computing is an integrated data analysis system that converts sets of position, velocity and acceleration state vectors between sixteen coordinate system types covering: Cartesian, Geocentric,
Geodetic, Inertial, Sine-space, Spherical, and UTM systems. Input and output coordinate systems may have: different types, different units, different origins, different orientations, and may be referenced to different datum and ellipsoids. ArrayTran is freeware.
• SPRING (Georeferenced Information Processing System) is a GIS and remote sensing image processing system with an object-oriented data model which provides for the integration of raster and vector data representations in a single environment. Freeware available.
• Cyze & Associates makes a number of binary packages freely available for download.
  

Other Software:

• Virtual Terrain Explorer from Altimap Software is a 3d visualization program that runs in real time and includes data for many US National Parks.
• Okino Computer Graphics ' USGS DEM - Geometry Import Converter manipulates and converts digital elevation model (DEM) data in the USGS format. Related software includes Okino's "NuGraf Rendering System" (renders or translates USGS DEM data) and "PolyTrans Model Translator" program (converts USGS DEM data to other file formats).
• DDviewer by CIESIN. DDViewer provides rapid data mapping, viewing and analysis to the internet community. It currently supports U.S. Census demographic data (STF3A 1990) and Boundary Files (TIGER 1992) which cover all the U.S. states, counties, county subdivisions, census tracts and blockgroups for more than 200 variables of population, housing, education, employment, etc.
• ER Mapper integrated mapping software featuring image processing, map production, 3D presentations and GIS integration, for Windows 95/NT and Unix.
• Algorithms for Computer Cartography by Jay Martin Anderson "is an electronic book or title, which describes and discusses algorithms and data structures for making maps by computer. The title was published privately in 1998, and is available for Macintosh, Power Macintosh, and Windows."
• 3DField is a contouring surface plotting program that quickly converts your data into contour maps and surface plots.
• Commercial Terrain Visualization Software Product Information from the U.S. Army Topographic Engineering Center - good comprehensive listing of terrain modeling software with descriptions.
• Terrain Tools and RoadEng freeware by Softree for natural resource applications.
• Map Maker Pro free evaluation copy from Map Maker Ltd.
• TatukGIS This download is a free executable that calculates datums and projections coordinates. This address bypasses the registration process.
• Silicon Spaceships . GeoVirgil is a program that allows you to view NASA .PDS data, which are satellite imagery of venus, earth, the moon, etc. These images can be downloaded for free from the Jet Propulsion Laboratory (NASA JPL) or written to CD for a low cost.  The software allows you to set different coordinate systems, export images into .jpg, view scalebars, etc.
• Geoclip. Interactive web mapping site with flash. Contains some free utilities to publish on-line statistically rich, 
  user-friendly and highly interactive maps.