Rocket Reads - A simpler alternative to Goodreads
Foursquare - Foursquare is all about helping you find new ways to explore your city.
Libro - Libro is an app created by book lovers, for book lovers.
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.
LibraryThing - A home for your books.
Yellow Pages - YP.com local search connects you with over 19 million local businesses.