GIS notes and link (Geographic Information System) Written by Todd Bowers Last update (7-11-05) Overview      These are some links to free GIS software for various platforms. ESRI Arc Explorer Free GIS viewer for MAC, PC, LINUX... GEOMAPAPP GeoMapApp is a data exploration and visualization tool that is being developed as part of the Marine Geoscience Data Management System GRASS for MAC Open source GIS for MAC. Works on many platforms, but not the easiest peiceof software to use. Not a software package you will be able to download and start using. ... Todd's Home Page