Windows App Studio
“A free, online app creation tool that allows you to quickly build Windows and Windows Phone apps to publish, test, and share. Make changes, add content, and toggle between phone and tablet views to watch your app come alive.”
“And if you want to advanced programming features, Windows App Studio generates your source code ready for Visual Studio – a feature no other app-builder tool provides. There is no better day than today, so get started!”
Your move, Embarcadero.