BestParking - Steers drivers toward the cheapest and most convenient garages and lots in 100 cities and 115 airports throughout North America.
AlpineQuest GPS Hiking - Comprehensive orienteering maps come complete with contour lines.
HearPlanet - The world’s largest audio guide pulls information from Wikipedia and its own database. Similar to audio guides handed out at museums.
Livingsocial - Find 50% off restaurant offers.
Zagat - A guide to discovering the best restaurants, bars, cafes and clubs.  Started with nine cities (Austin, Boston, Chicago, London, Los Angeles, New York, Philadelphia, San Francisco, Washington DC) with more on the way.
World Clock - Time Zones - provides easy access to the time in hundreds of cities and adding several clock as home screen widgets.
Tripit - Combine all your travel reservations in a single locations.
JetLag Genie - Gradually alter your sleep habits before a trip to better deal with jet lag.
TravelSafe - A database of emergency service and embassy phone numbers for almost every country.
Yelp - Find places to eat, shop, drink, relax, and play and read reviews from knowledgable locals.
Packing Pro - Enter destination, length of trip and who with and it will provide a list of what you may need.
Dineoutcheap - Gives diners a fast and easy way to find deals.
Ski & Snow Report - Get the latest ski reports with detailed trail maps.
Tipulator - Makes tipping easy even with split bills.
WhatsApp Messenger - Provides the ability to send data (including pictures, videos, sound clips, and GPS tags as well as text) via Wi-Fi for free to people anywhere in the world.