Guides by Lonely Planet - Explore city guides curated by experts.
Detour - Immersive audio walks, now in 17 cities
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.
Tales & Tours - The personal tour guide that fits in your pocket
Lonely Planet - travel guide book publisher
Kolu - Tailored city tours from guides matched to your interests