MAPS.ME is described as 'Offers the quickest offline maps of all the countries of the world. Travel with full confidence: wherever you are, MAPS.ME addresses all your offline mapping needs' and is a very popular GPS Navigation service in the travel & location category. There are more than 50 alternatives to MAPS.ME for a variety of platforms, including Android, iPhone, Web-based, iPad and Android Tablet apps. The best MAPS.ME alternative is CoMaps, which is both free and Open Source. Other great apps like MAPS.ME are Organic Maps, OpenStreetMap, Google Maps and OsmAnd.
Métro is your free guide on PDA to public transport systems (buses,metro,tram,trains). 400 cities are covered now worldwide: http://metro.nanika.net/MetroV-en.html .
CityGuide is a next-generation offline GPS navigator that offers maps from various vendors, including OSM (OpenStreetMap), HERE (NOKIA) maps, CityGuide maps, and other high-quality maps from national producers.
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Russia