https://websitebaker.org/pages/en/home.php

Website Baker, the Open Source Content Management System designed to enable users to produce websites with ease.

http://sapid.sourceforge.net/en/

http://pivotx.net/

http://phpsqlitecms.net/

phpSQLiteCMS is a simple and lightweight open source web content management system (CMS) based on PHP and SQLite.

http://jaf-cms.sourceforge.net/

https://www.freeguppy.org/?lng=en

GuppY, the easy web portal, that doesn't require a database to run!

http://get-simple.info/

The Simplest Content Management System. Ever. GetSimple has everything you need, and nothing you don't

http://fmpp.sourceforge.net/

http://www.flatnux.altervista.org/

Flatnux is a CMS (Content Management System) with textual database easily customizable.

https://sourceforge.net/projects/fpwe/