This is one of the reason I built Cigala [1], it's a single PHP script that let you build your website in the admin interface using a WYSIWYG editor (TinyMCE) that manipulates an SQLite database, and that produce static HTML pages for publishing. It only depends on PHP and SQLite which are available virtually everywhere for free (and in the worst case you can run it locally as the resulting static website can be copied to any static hosting).

[1] https://code.up8.edu/pablo/cigala