QGIS - QGIS is a desktop geographic information system, or GIS.
GPSies - With GPSies you can view and download tracks which have been recorded by a GPS device.
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.
AllTrails - Explore over 50,000 trails, reviews, and photos. Share them…
SAGA GIS - SAGA - System for Automated Geoscientific Analyses - is a Geographic Information System (GIS)...
TrailLink - TrailLink is the best-in-class trail-finder Website and app that provides detailed descriptions, photos, reviews to help hikers and outdoor enthusiasts plan their trips.