There is a plenty of GIS software now available, we will concentrate on recommendations for free (and mostly open source software) that can be used for archaeological purposes.
- gvSIG: A free and open source software, the very useful version provided by Oxford Archaeology (http://oadigital.net/software/gvsigoade) will not be maintained any longer. We recommend the Community Edition (http://gvsigce.org/) which will provide a number of very helpful tools, especially for archaeologists.
- GRASS GIS: One of the most popular and most used free GIS software solutions -> http://grass.fbk.eu/
- Quantum GIS is a very easy to use software -> http://qgis.org/
- LandSerf is a freely available GIS for the visualisation and analysis of surfaces -> http://www.soi.city.ac.uk/~jwo/landserf/
- SAGA GIS is also a very powerful free and open source GIS -> http://www.saga-gis.org/