I've tested a few of these out including Macaw and some of the biggest features I look for is easy export and ability to edit HTML while using the "builder." I

I've tested a few of these out including Macaw and some of the biggest features I look for is easy export and ability to edit HTML while using the "builder." It seems like there is a big race to build these right now, because they have been adopted by a lot of respected developers. "Page builders" have been around for a long time, but a page builder that renders Bootstrap is another deal. I'll give it a try.