World Clock - Time Zones - provides easy access to the time in hundreds of cities and adding several clock as home screen widgets.
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.
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.
WhatsApp Messenger - Provides the ability to send data (including pictures, videos, sound clips, and GPS tags as well as text) via Wi-Fi for free to people anywhere in the world.
Instagram - Coverts photos into works of art. Instagram gives photos professional, antiquated, or artistic looks. It makes sharing pictures across social media networks easy.
TripAdvisor - Honest reviews of hotels, restaurants, attractions, and more.
Foodspotting - Focuses on specific dishes with user generated recommendations.
Passbook - Passbook is an application in Apple’s iOS that allows users to store coupons, boarding passes, event tickets, store cards, generic cards, and other forms of mobile payment.
Knapsack - Plan your trip and later share memories.
Perfect World Clock - Provides easy access to the time in hundreds of cities adding several clocks as home screen widgets.
Yelp - Find places to eat, shop, drink, relax, and play and read reviews from knowledgable locals.
Livingsocial - Find 50% off restaurant offers.
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.
HearPlanet - The world’s largest audio guide pulls information from Wikipedia and its own database. Similar to audio guides handed out at museums.
RoadAhead - Find the best exit ahead on the highway to meet your travel needs.