If you’re a Web developer—including ASP.NET—you can apply your existing knowledge of open standard HTML5, JavaScript and CSS3 directly to Windows Store app development. Web developers may continue to use many popular third-party JavaScript libraries such as jQuery or Knockout. For this article, I’ll use JavaScript as the language of choice. No matter where your development background lies, the barrier to entry is low when developing native Windows 8 apps. This is because the Windows Runtime (WinRT) is a platform that contains APIs that sit on top of the Windows core services.