PhotoSynth - Enables users to take awe inspiring panoramic pictures in an instant and is fully integrated with Facebook.
Instagram - Coverts photos into works of art. Instagram gives photos professional, antiquated, or artistic looks. It makes sharing pictures across social media networks easy.
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.
Trip Journal - This virtual travel scrapbook will also create maps of your various explorations as long as your GPS in turned on, geo tagged with pictures, videos, and notes.
Tripit - Combine all your travel reservations in a single locations.
Livingsocial - Find 50% off restaurant offers.
AlpineQuest GPS Hiking - Comprehensive orienteering maps come complete with contour lines.
TripAdvisor - Honest reviews of hotels, restaurants, attractions, and more.
ExpertFlyer - Get notified when seats become available.
Tipulator - Makes tipping easy even with split bills.
Knapsack - Plan your trip and later share memories.
Groupon - Find 50% to 70% off restaurant offers.
The Weather Channel - View current weather, hourly, 36 hour and 10 days forecasts.  Will forecast weather throughout the United States.
Packing Pro - Enter destination, length of trip and who with and it will provide a list of what you may need.
FlightTrack - Follow international flights with detailed information on departure gates, delays, and cancellations.