Sygic Travel Maps - Itinerary planner for independent travelers
Foursquare City Guide - Foursquare City Guide is a Free to use mobile application that will lead you to the perfect spot anytime anywhere around the world.
Detour - Immersive audio walks, now in 17 cities
Lonely Planet - travel guide book publisher
Foursquare 10 - Your ultimate city guide, in your pocket
The Basetrip - Cities - Travel information for 650+ cities & 230+ countries