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.
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Wikitravel - This article is a Movie/TV Tour.
Cool Cousin - Shaking up the travel world with good old human connection
Foursquare - Foursquare is all about helping you find new ways to explore your city.
Triip.me - The happiest way to travel in 227 countries