GIS Product

Open source software Most widely used open source applications:
GRASS – Originally developed by the U.S. Army Corps of Engineers, open source: a complete GIS
MapServer – Web-based mapping server, developed by the University of Minnesota.
Other open source GIS applications:

gvSIG 1.0
SAGA GIS – – System for Automated Geoscientific Analyses- a hybrid GIS software. SAGA has a unique Application Programming Interface (API)and a fast growing set of geoscientifc methods, bundled in exchangeable Module Libraries.
Quantum GIS – QGIS is a user friendly Open Source GIS that runs on Linux, Unix, Mac OS X, and Windows.
MapWindow GIS – Free, open source GIS desktop application and programming component.
ILWIS – ILWIS (Integrated Land and Water Information System) integrates image, vector and thematic data.
uDig
gvSIG – Open source GIS written in Java.
Chameleon – Environments for building applications with MapServer.
GeoNetwork opensource – A catalog application to manage spatially referenced resources
GeoTools – Open source GIS toolkit written in Java, using Open Geospatial Consortium specifications.
JUMP GIS – Java Unified Mapping Platform. (See end of page for JUMP derivative projects, like Kosmo and OpenJUMP)
MapGuide Open Source – Web-based mapping server.
OpenLayers – open source AJAX library for accessing geographic data layers of all kinds, originally developed and sponsored by MetaCarta
PostGIS – Spatial extensions for the open source PostgreSQL database, allowing geospatial queries.
TerraView – GIS desktop that handles vector and raster data stored in a relational or geo-relational database.
Xastir A special purpose Open Source GIS application used as an APRS client by Amateur radio operators, written in C for X Window environments.

[edit] Notable commercial or proprietary GIS software
Most widely used notable proprietary software applications and providers:
Hydro GeoAnalyst— Environmental data management and visualization software by Schlumberger Water Services.
Autodesk – Products include MapGuide and other products that interface with its flagship AutoCAD software package.
Cadcorp – Developers of GIS software and OpenGIS standard (e.g. Read/Write Open Source PostGIS database).
Intergraph – Products include GeoMedia, GeoMedia Profesional, GeoMedia WebMap, and add-on products for industry sectors, as well as photogrammetry.
ERDAS IMAGINE – A proprietary GIS, Remote Sensing, and Photogrammetry software developed by ERDAS, Inc.
ESRI – Products include ArcView 3.x, ArcGIS, ArcSDE, ArcIMS, and ArcWeb services.
IDRISI – Proprietary GIS product developed by Clark Labs.
MapInfo – Products include MapInfo Professional and MapXtreme. integrates GIS software, data and services.
MapPoint – Proprietary GIS product developed by Microsoft.
GISNet— A web-based GIS system developed by MRF Geosystems Corporation.
Caliper – Products include Maptitude, TransCAD and TransModeler. Develops GIS and the only GIS for transportation.
Pictometry – Proprietary software which allows oblique images to be draped with shapefiles. Many gov't applications (fire, 911, police, assessor) as well as commercial.
Black Coral Inc — a leading edge product company developing geospatial collaboration capabilities that enable better outcomes for personnel and tactical teams operating in emergency response and military environments.
Other notable proprietary software applications and providers:
CARIS (Computer Aided Resource Information System) – GIS systems for hydrography and cadastral systems.
DeLorme – Producer XMap and other GIS tools, data, and GPS hardware.
GMS – Three-dimensional environment for building geologic and groundwater models
Manifold System – Low-cost GIS software package.
Oracle Spatial – Product allows users to perform basic geographic operations and store common spatial data types in a native Oracle environment.
Orbit GIS Generic and multi-purpose GIS toolkit, written using 100% Java.
Safe Software – Spatial ETL products including FME, SpatialDirect and the ArcGIS Data Interoperability Extension.
Smallworld – developed in Cambridge, England (Smallworld, Inc.) and purchased by General Electric and used primarily by public utilities.
AvisMap @ – Products include AvisMap GIS Engine, AivsMap Desktop, AvisMap Free Viewer, and SDM(Spatial Database Management).

[edit] Other GIS software
CrossView for ArcGIS – created by A-Prime Software, CrossView is a wizard-based ArcGIS plug-in, which enables map cross-sectioning and profile creation.
GeoBase – Geospatial platform developed by Telogis. A particular focus is placed on real-time processing for reverse-geocoding, geofencing, etc.
GGP GIS – created by GGP Systems Ltd, GGP GIS is a GIS application used mainly by UK local authorities.
GeoAgro GIS – created by GeoAgro, GeoAgro GIS is a GIS specialized for agriculture and environmental applications.
ILOG JViews Maps, Java library for map display with overlays as symbols and diagrams.
LandSerf – Free GIS written in Java. Source available but not strictly open source.
Panorama – Russian GIS for military uses.
SPRING – GIS software developed at INPE - Instituto Nacional de Pesquisas Espaciais and available free of charge.
TC Technology – GO! Sync Mapbook, A Mobile GIS mapping application built on ArcGIS Engine. Redlining, Inspections, GPS, Tracing functionality. Eliminates paper maps for field personnel.
TerraLib – GIS class and functions library, available from the Internet as open source, allowing a collaborative environment and its use for the development of multiple GIS tools.
TNTmips – Geospatial analysis system providing a GIS, RDBMS, and automated image processing system with CAD, TIN, surface modeling, and data publishing tools.
SavGIS – Free and complete GIS software available in French, English and Spanish, developed since 1984 by the Development Research French Institute (IRD)
Tilcon GIS Maps – Tilcon - an embedded graphical user interface company produces a GIS application development module.
Scenome – Software for building geo-referenced terrain databases from industry standard GIS formats such as DEM and GEOTIFF.
GDAL – Geo-Data Abstraction Library. Popular open-source product for managing GIS data.
PROJ4 – Popular, open-source product for converting GIS data between projections.
MapTools – Suite of open-source GIS products and platforms.
Spatial Communication – Spatcom (Spatial Communication) is a Free and Share GIS Software with Digital Map Data Made in Indonesia.
OpenStreetMap – Online map viewer, with map editing capability.
Elshayal Smart GIS – The First Arabian GIS Software
Netcad is the first Turkish GIS Software, owned by ULUSAL, with English and Turkish support.