MakCorps - Hotel Price Comparison API
TravelPeri - Find top tourist attractions to explore, with travel times!
HotelTonight Escape - The best getaway deals for tonight (or the weekend)
Roaded - Travel journal and road trip planner - create beautiful interactive travel stories, sell travel...
Hotellook - Compare hotel deals from all the leading booking agencies
TripIt - TripIt is a travel app that creates a master itinerary to organize all of your plans for your vacation or work trip in one spot.