ArcGIS is a mapping tool (geographic information system) for PC/Macs, allowing the user to apply data to several base layers (such as Google Earth, topographical maps, military maps, or any importable map). The interface also empowers the user to look up grid coordinates, plan routes, or import symbols. Thus, ArcGIS is a great tool for planning and for digital reconnaissance work.
See ESRI ArcGIS at: http://www.esri.com/software/arcgis/explorer
Download Explorer for ArcGIS for Mac at: http://doc.arcgis.com/en/explorer/
Download Explorer for ArcGIS for PC at: http://www.esri.com/software/arcgis/explorer-desktop