Windows 8 added a whole new class of mobile apps designed for touch interfaces, apps that got a whole lot better with Windows 8.1. Formerly called "Metro" apps, they are now just called "modern" or "new-style" apps, to differentiate them from the millions of traditional Windows applications that still run in the new operating system's desktop mode. Granted, that's catastrophically bad marketing, but the apps themselves are slicker than ever. While over 120,000 of these third-party apps are available in the Windows Storeâ