In reply to Donna.

These articles mention some: Link1, Link2
To sum it up if you are interested in a platform that even the client can easily use after the development is done than Jekyll, Craft, Contao or Ghost are worth to try.

If you need something more advanced you might consider drupal 8.4, joomla or typo3. These might be however too complicated for some clients to put new content inside.

The beauty of WP was that it had a really good balance between these 2 weight classes, but this balance was lost somewhere at WP 4.1 and if GB will be released as we were told until now, then soon WP will be a real rough and unpredictable adventure for the client. I am really sorry to say all that as WP has made me everything so easy in the past.