World Clock - Time Zones - provides easy access to the time in hundreds of cities and adding several clock as home screen widgets.
TripAdvisor - Honest reviews of hotels, restaurants, attractions, and more.
iMovie - Provides best option to shoot and send videos back home. Soundtracks and shot transitions can be dragged and dropped to create movie postcards.
Google Translate - Translates user’s words as they are spoken into a device’s mic. Has a database of 50 languages.
Packing Pro - Enter destination, length of trip and who with and it will provide a list of what you may need.
AlpineQuest GPS Hiking - Comprehensive orienteering maps come complete with contour lines.
Google Goggles - Search by taking a picture. Users can point their cell phone cameras at paintings, famous landmarks, barcodes or QR products, or popular images. If Goggle finds it in its database, useful information will be returned.
Yelp - Find places to eat, shop, drink, relax, and play and read reviews from knowledgable locals.
Wi-Fi FInder - Directions to your nearest source of wireless internet. Comes with an offline mode so that users can download maps.
RoadAhead - Find the best exit ahead on the highway to meet your travel needs.
iMuseum - A web tracker that searches via GPS the closest museums in your immediate area. Updates museum news and exhibition info regularly.
TravelSafe - A database of emergency service and embassy phone numbers for almost every country.
mTrip - Provides travel guides around the world, offline maps & navigations, personalized itineraries of visits, and trip journal and sharing.
Foodspotting - Focuses on specific dishes with user generated recommendations.
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.