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Instagram - Coverts photos into works of art. Instagram gives photos professional, antiquated, or artistic looks. It makes sharing pictures across social media networks easy.
Tripit - Combine all your travel reservations in a single locations.
FlightAware - Track your flight by entering your airline and flight number and receive updates on flight delays, gate changes, and/or cancellations.
Yelp - Find places to eat, shop, drink, relax, and play and read reviews from knowledgable locals.
HopStop - Offers public transport information on 68 of the world’s biggest, busiest metropolitan hubs.
TravelSafe - A database of emergency service and embassy phone numbers for almost every country.
Waze - Provides user submitted traffic report to offer the fastest route for current road conditions.
EHU - Helps campers and caravanners keep track of the electrical output of their assorted travel gadgets to avoid overloading the circuit.
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.
MoneyPass - Access locations of over 20,000 surcharge free ATMs either by entering an address, a zip code, or using your current location. 
PhotoSynth - Enables users to take awe inspiring panoramic pictures in an instant and is fully integrated with Facebook.
Evernote - Take notes, capture photos, create to do lists, record voice reminders, and make these notes completely searchable. Users can combine and share travel notes.
Seatguru - Shows the best seats on every plane and where power ports are located.
RoadNinja - Always know what is coming up at the next exit and compare gas prices at upcoming exits.
Packing Pro - Enter destination, length of trip and who with and it will provide a list of what you may need.