JetLag Genie - Gradually alter your sleep habits before a trip to better deal with jet lag.
HearPlanet - The world’s largest audio guide pulls information from Wikipedia and its own database. Similar to audio guides handed out at museums.
Dineoutcheap - Gives diners a fast and easy way to find deals.
PhotoSynth - Enables users to take awe inspiring panoramic pictures in an instant and is fully integrated with Facebook.
iMuseum - A web tracker that searches via GPS the closest museums in your immediate area. Updates museum news and exhibition info regularly.
Tripit - Combine all your travel reservations in a single locations.
mTrip - Provides travel guides around the world, offline maps & navigations, personalized itineraries of visits, and trip journal and sharing.
Google Wallet - Send money from anywhere to a friend in the US who has an email address.  Store loyalty programs in Google Wallet and leave the plastic cards behind.
Yelp - Find places to eat, shop, drink, relax, and play and read reviews from knowledgable locals.
Foodspotting - Focuses on specific dishes with user generated recommendations.
Google Maps - Accurate GPS enabled maps along with voice navigation.
Where To? - Enables user to locate almost anything nearby, including the nearest ATM, burger joint, and medical provider. 
MoneyPass - Access locations of over 20,000 surcharge free ATMs either by entering an address, a zip code, or using your current location. 
EHU - Helps campers and caravanners keep track of the electrical output of their assorted travel gadgets to avoid overloading the circuit.
Packing Pro - Enter destination, length of trip and who with and it will provide a list of what you may need.