Schemer - Google’s test crowd sourced travel guide.  Users leave recommendations for things to do in their city and visitors can add to a to do list and check off as they go.
BestParking - Steers drivers toward the cheapest and most convenient garages and lots in 100 cities and 115 airports throughout North America.
Lemon Wallet - Allows user to store a digital copy of all cards – ID, insurance, loyalty, and payment card, so that they can be accessed whenever needed.
AlpineQuest GPS Hiking - Comprehensive orienteering maps come complete with contour lines.
Perfect World Clock - Provides easy access to the time in hundreds of cities adding several clocks as home screen widgets.
FlightAware - Track your flight by entering your airline and flight number and receive updates on flight delays, gate changes, and/or cancellations.
Google Translate - Translates user’s words as they are spoken into a device’s mic. Has a database of 50 languages.
HearPlanet - The world’s largest audio guide pulls information from Wikipedia and its own database. Similar to audio guides handed out at museums.
TripAdvisor - Honest reviews of hotels, restaurants, attractions, and more.
Air Sharing - Turns your iPhone into a wireless hard drive, allowing the user to quickly load documents at the airport that can be viewed in flight.
myLanguage Translator Pro - Translate text into spoken voice.
RoadNinja - Always know what is coming up at the next exit and compare gas prices at upcoming exits.
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.
JetLag Genie - Gradually alter your sleep habits before a trip to better deal with jet lag.
Tripit - Combine all your travel reservations in a single locations.