I am looking for a free (open source) or low cost WYSIWYG website builder that I can host on my own server. It needs to be able to handle multiple separate sites on different domains, and it needs to be usable by a non-programmer while preferably also allowing direct code editing for more advanced users.
In effect, I'm trying to host my own copy of Wix.com / Squarespace / Weebly for a bunch of local organizations to which I provide tech support.
I already know about Ghost, but the people who will be working on these sites will just be confused by Markdown.