2GIS - 2GIS provides 3D-maps of 180+ cities, contacts of 1.
Google Maps - Find local businesses, view maps and get driving directions in Google Maps.
OsmAnd - Global mobile map viewing and navigation for online and offline OSM maps
Google Earth Pro - Google Earth Pro allows you fly anywhere around the earth to view satellite imagery, maps, 3D building, and terrain, from galaxies in outer space to the canyons of the ocean.
RMaps - RMaps is the navigation tool. You can use RMaps like online map viewer for some popular maps.
Instant Street View - Instant Street View is a Google-powered street viewing website.