We have just released the Wireframe app for Enonic XP. The Wireframe app lets you create wireframes and mock ups directly in Enonic XP. The app features 1 to 4 column layouts with adjustable column widths, which lets you build almost any kind of web page layout. Fill your page with sample content such as galleries, maps, text, images, breadcrumbs and more. Gradually add the content you want. Actually, it is possible to do the entire web development project with this app, evolving from the wireframe stage through development, testing and, finally, publishing your web app.
https://market.enonic.com/vendors/enonic/com.enonic.app.wireframe
