We’ve developed two demonstrations using our Page Builder tool. The first uses Bootstrap and a free theme, the second uses Zurb’s Foundation. We cut up their html themes into useable templates, demonstrating how easy it is for developers and clients to construct and edit content.
There’s also a demonstration you can play with, where you can edit a CSS Flexbox framework within rgeEditor.
And to top it off, a "quick n’ dirty" site demo loading entire pages from a selection of 3rd party websites into rgeEditor.