AppBuilder is an open-source IDE to create your own app with ease.
It includes a blue-prints system to script your application, and a drag drop interface to make app creation easier.
Actually WIP, but we are aiming to a full node & block system, where anyone will be able to create its own complex script.
Drag & Drop interface is currently WIP, but it the future you will be able to make your application easily just by dragging each component where you want.
The Drag & Drop interface will include a tag editor to manage deeper each component of your application.