1. Facebook I see a lot of people looking at cell phones on my way to work every day, and the number-one thing I see them doing is looking through their Facebook newsfeed. These days, not having Facebook is pretty much like not having a telephone. The built-in Windows Phone People app lets you hook up your Facebook (and Twitter) contacts and see the latest updates, but the official Facebook app lets you do every kind of Facebooking—posting updates, photos, and check-ins. You can pin tiles to the home screen for Facebook messages, places check-in, or groups, as well as just for the overall app. One of our absolute favorite features, though, is that you can have the app set your lock screen to cycle through your top-liked photos. Windows Phone Store Link: Facebook 2. Skype 2. Skype [slide ID: 386788] The video phone is here, and it's Skype ! Of course, your videocalling partner doesn't need a Windows Phone: You can Skype with anyone