Flight Tracker ($4.99)

Get real-time information on departures, delays, cancellations and gate numbers at a glance, with international coverage for international flight tracking.

The fourth-most downloaded app of all time, Shazam ensures youll never let a song you love—but dont recognize—pass you by.

You know the deal—instantly share your thoughts in 140 characters or less, track your friends (or celebrities, if you must) and join the conversation.

This free service lets you share photos, documents and video anywhere—and any file you save to your account saves to all your computers.

The ubiquitous game is the one to beat for popularity and sheer time-wasting potential. Why on earth havent you downloaded this yet?

Share much more than quick thoughts with Facebook, which connects you to pretty much anyone youve ever met at this point. You know what to do.

Choose from a variety of filters and effects to personalize your high-quality iPhone shots, then share them with a single click of a button.

Call, instant message or video call with your friends on Skype without paying a dime, or use it when youre traveling overseas. Either way, its essential.

More than just flight, hotel and car rentals, this app lets you manage your travel itinerary and compare prices on all of the above.

Instantly find WiFi hotspots the world over, with more than 145,000 free access points across the globe.