Google Translate - Translates user’s words as they are spoken into a device’s mic. Has a database of 50 languages.
Yelp - Find places to eat, shop, drink, relax, and play and read reviews from knowledgable locals.
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.
AlpineQuest GPS Hiking - Comprehensive orienteering maps come complete with contour lines.
Packing Pro - Enter destination, length of trip and who with and it will provide a list of what you may need.
ExpertFlyer - Get notified when seats become available.
Tipulator - Makes tipping easy even with split bills.
World Clock - Time Zones - provides easy access to the time in hundreds of cities and adding several clock as home screen widgets.
EHU - Helps campers and caravanners keep track of the electrical output of their assorted travel gadgets to avoid overloading the circuit.
Opentable - Reserve tables and earn rewards at over 20,000 U.S. restaurants.
myLanguage Translator Pro - Translate text into spoken voice.
EveryTrail - Track, share and explore.  Plot your trip, photos, and video right on the map and upload it to EveryTrail, Facebook, and Twitter.
Waze - Provides user submitted traffic report to offer the fastest route for current road conditions.
iMuseum - A web tracker that searches via GPS the closest museums in your immediate area. Updates museum news and exhibition info regularly.
XE Currency - Quotes live currency rates.