QGIS - QGIS is a desktop geographic information system, or GIS.
Apple Maps - Maps features an all-new design with smart features to make finding and getting to your destination easier than ever.
what3words - Geocoding system for the simple communication of locations with a resolution of 3 m
uMap - uMap let you create maps with OpenStreetMap layers in a minute and embed them in your site.
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.
2GIS - 2GIS provides 3D-maps of 180+ cities, contacts of 1.