OsmAnd - Global mobile map viewing and navigation for online and offline OSM maps
Google Maps - Find local businesses, view maps and get driving directions in Google Maps.
MAPS.ME - Fast, detailed and completely offline maps for mobile devices
Mapbox - An open source mapping platform for custom designed maps. Our APIs and SDKs are the building blocks to integrate location into any mobile or web app.
HERE WeGo - HERE WeGo - Maps - Routes - Directions - All ways from A to B in one
QGIS - QGIS is a desktop geographic information system, or GIS.