Skype is the go-to app for staying in touch with friends and family because it's not limited to one platform. Whether you're using an iPad, Kindle Fire HD or Microsoft Surface, you'll be able to chat face to face using your device's front-facing camera. Even if you don't feel camera-ready on any given day, you can make free Skype-to-Skype calls to the more than 250 million people that use this service. A new emoticon picker spices up the instant- messaging experience. Skype is especially compelling on Windows 8 and Windows RT devices because you can snap a friend to the side of your screen while you're using another app. We won't tell.