Organic Maps works quite well. Though Google Maps is still better for car navigation and POIs - but if you need it for walking/hiking/tourism or need offline ma

Organic Maps works quite well. Though Google Maps is still better for car navigation and POIs - but if you need it for walking/hiking/tourism or need offline map data then it can be much better. Obviously there is also the entire privacy/open data angle that may be crucial or irrelevant. Mapy.cz are quite nice (sadly, they fail to mention source of data in violation of OSM license)