AwardWallet - AwardWallet provides a free service that helps you manage your reward balances and travel...
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.
United Airlines - United Airlines is a reservation site for flights where you can book airline tickets and is also offering membership for exclusive discounts.
Sygic Travel Maps - Itinerary planner for independent travelers
Agoda YCS for hotels only - Agoda YCS for hotels only is a traveling app that comes up with features to help users in minimizing their hotel booking efforts by providing them with a large number of choices all around the globe.
Travelchime - Google Docs for planning your trips with friends.