‘Trip It’ is one of the most popular/downloaded travel apps. The app takes all of your travel itineraries (forwarded to [email protected]) and creates one detailed itinerary. ‘Trip It’ then syncs that itinerary with your online calendar and www.tripit.com. You can share your itinerary with friends and family on Facebook and linkedin if you want. There are three versions of the app, a free version, a version with no ads for $4.99 and a business version.
Travel Tuesday: 5 Must-Have Travel Apps for Summer Vacations

My favorites are ‘Just Landed’ and the ‘Heads Up’ game!