Forward confirmation e-mails from airlines, hotels, and online booking services to TripIt, which will generate a trip itinerary with flight, hotel, and car rental details. You can choose to automatically add itineraries to Google Calendar or share them with members of your TripIt network to keep your colleagues, business associates, and friends up to date on your travel plans. Creating a network is easy: TripIt gives you the option to e-mail individuals or send group invitations to contacts on LinkedIn or Web-based e-mail accounts such as Gmail and AOL.
Cost: Free