This is the third edition of the Lucky Fifty, our annual look at the most interesting travel/tourism based digital sites. The first two years we focused on Web sites, this year we are focusing on mobile apps. To learn more about Luckie, please visit www.luckie.com.

5. Destination Information Loopt Where Traveler Unlike City Guide LonelyPlanet Guidebooks LocalEats Roadside America Mobile Magic Amsterdam At Your Fingertips Adidas Urban Art Guide to Berlin Trazzler Expedition Timberland Useful Tools OpenWays Flying Without Fear SodaSnap goPostal Postino Wi-Fi Finder Room InnTouch Frommer’s Travel Tools Babelingo mPassport GasBook Cheap Gas! GasBag eCurrency Converter My Vacation On The Road World Customs and Cultures Jetset: A Game for Airports Augmented Reality RealSki True City Discover Anywhere Transit UrbanSpoon Scope buUuk Layer Wikitude Of the thousands of mobile travel apps out there, these are the 50 or so we think are the most useful, interesting or engaging Itinerary Tracking TripTracker TripCase WorldMate TripIt Booking Airfare Wanderlust Hotels.com CarRentals OpenTable Kayak GPS Based EveryTrail HotelsByMe Next2Me Have2P SitOrSquat AroundMe Happy Hours Super Twiddler