QGIS - QGIS is a desktop geographic information system, or GIS.
Maptitude - Maptitude is a mapping software that is fitted with GIS features that avail maps and other forms of data regarding the surrounding geographical areas. Read more about Maptitude.
GRASS GIS - GRASS GIS is a free Geographic Information System (GIS) software used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization.
PostGIS - Open source spatial database
SAGA GIS - SAGA - System for Automated Geoscientific Analyses - is a Geographic Information System (GIS)...
Garmin BaseCamp - Garmin® BaseCamp® provides an interface for viewing Garmin map products and managing...