Online Maps

Navteq: Bing, Yahoo, Mapquest
Google: Google
Tele Atlas: Apple iOS, Mapquest Apps

** Landmarks and Buildings,
OpenStreetMap: Open.MapQuest, [not working Bing Maps (wiki)]

Open Street Map apps: 

* OsmAnd Maps OsmAnd Pro subscription, Maps Plus subscription/payment

  Configure map: Hide Boundaries, House numbers; Transport Subway routes.  Map Style: OsmAnd (trail illegible), UniRS (clear trail), Touring view (thick trail, road too thick, do not have ped xing), LightRS (no ped xing, no subway route), Offroad (no ped xing, no subway), Desert (trail illegible), Snowmobile (blue theme, low contrast), OSM-carto (trail not clear), Topo (no ped xing, no subway) 
* Organic Maps 

* Maps.me subscription 

** Automatically highlighted City Boundaries with some limited buildings and landmarks
Wikimapia

Google Maps Free Alternatives

Town, Cities, Places Boundary Map no longer available
** Zipcode Boundary Map  (colored zip code lookup)
** Color-coded city limits map