https://codecanyon.net/item/cornerstone-the-wordpress-page-builder/15518868

Cornerstone is a 100% front-end WordPress page builder that will change the way you create pages. Gone are the days of having to click back and forth between a clunky admin panel and your site. Now you can see all of your work as you build the page, bringing fun back into the creative process.

Changelog

Feature: System UI added to list of System Fonts

Feature: Row inner element HTML tag control

Feature: Type 'object' available for usage in all Dynamic Content

Updated: Dot syntax can be used for ACF values in an ACF repeater. In other words, you can access ACF object fields like `map.lat` when in an ACF repeater

Bugfix: Chrome scrollbars still causing overflow issues on conditions picker when the select box was too large

Bugfix: Touch scrolling through a slider would cause drag events to trigger

Bugfix: Alert Element with a scroll effect would never be hidden when closed

Bugfix: Alert Element when closed in the preview would cause the element to crash when you updated the controls after it closed

Bugfix: Alert Element did not work in the Starter or blank stack

Bugfix: Marquee slider that was significantly smaller then the screen would never wrap more then once causing blank space