3map is a Free Software project being built with the support of the Telstra Broadband Fund that provides the client and server capabilities to deliver the Web Augmented
AccuGlobe Desktop 2007 is free to download. Add specific functionality with extensions and plugins.
Aero-Triangulation System software - A collection of Fortran and C programs, UNIX shell scripts, and text files used to perform image coordinate refinement, block adjustment, statistical reporting, and plotting.
AGIS for Windows A simple mapping and GIS shareware package that includes a tutorial to help you with making your own map displays.
ArcGIS Explorer and ArcExplorer are freely available, easy to use, geographic data viewers whose purpose is to allow organizations to provide access to their GIS to a wide audience of non-expert users.
ArcVoyager was created by ESRI's Schools and Libraries team to go along with ArcView. It is a 50-mb package of carefully selected data, ArcView projects, and help files, in a tiered format. There are comparable Windows and Macintosh versions. The help files are written broadly to a
"junior high" level, but ArcVoyager is being used effectively by elementary teachers, middle school students, high schoolers, librarians, college instructors, museum professionals, or parents. Arcview is not required.
AutoREALM is a Free GNU mapping software (a "cartographer") that can design maps of castles, cities, dungeons and more. AutoREALM is generally used by Role-playing Game practicants who enjoy doing their own maps. But it could fits the needs of other people.
Enjoy! I'll be posting more soon.