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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.
Touchnote - Send real postcards using cell photos.
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.
FlightAware - Track your flight by entering your airline and flight number and receive updates on flight delays, gate changes, and/or cancellations.
Tripit - Combine all your travel reservations in a single locations.
BestParking - Steers drivers toward the cheapest and most convenient garages and lots in 100 cities and 115 airports throughout North America.
Foodspotting - Focuses on specific dishes with user generated recommendations.
Groupon - Find 50% to 70% off restaurant offers.
Dineoutcheap - Gives diners a fast and easy way to find deals.
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.
myLanguage Translator Pro - Translate text into spoken voice.
Waze - Provides user submitted traffic report to offer the fastest route for current road conditions.
FlightTrack - Follow international flights with detailed information on departure gates, delays, and cancellations.
mTrip - Provides travel guides around the world, offline maps & navigations, personalized itineraries of visits, and trip journal and sharing.