The video-chatting, free conference-calling space is far more crowded now than when Skype entered it. However, this app is polished and well-integrated with Windows 8. We love how easy it is to snap Skype next to other apps so you can keep chatting while you multitask. You can also easily share files and photos. If you get a message, you'll see it no matter what you're doing, even on the lock screen.