Tripadvisor - The Tripadvisor mobile app is available for the Android and iOS platforms. It can be used to create reviews of hotels, restaurants, and to chat with other travelers on Tripadvisor forums.
GetYourGuide - Get tickets to the most popular attractions while travelling
Wikitravel - This article is a Movie/TV Tour.
Airbnb Experiences - Airbnb expands beyond rentals — now hosting Experiences
Foursquare - Foursquare is all about helping you find new ways to explore your city.
Viator - Tours, things to do, sightseeing tours, day trips and more from Viator.