CDC: Epi Info Epi Info is free software developed by the CDC which can be downloaded from this web site. Epi Info is a sophisticated suite of software including various applications which can be used to develop databases and analyze epidemiologic statistics. Tutorials and user support materials are also available at the Epi Info web site.
ArcGIS Explorer ArcGIS Explorer is Geographic Information System mapping software which can be downloaded for free from this web site. ArcGIS Explorer is sophisticated software can be used to create custom maps with your own data, which can be combined with features and tools provided by ArcGIS.