OsmAnd - Global mobile map viewing and navigation for online and offline OSM maps
YourMapp - YourMapp lets you turn your custom maps into an interactive app.
MAPS.ME - Fast, detailed and completely offline maps for mobile devices
Google Maps - Find local businesses, view maps and get driving directions in Google Maps.
HERE WeGo - HERE WeGo - Maps - Routes - Directions - All ways from A to B in one
Windows Maps - Maps is your guide to everywhere.