Coranto is an open source framework/cms that uses a flat file (text file) database. Coranto has a very small install size, with much of the functionality added through plugins, and is a CGI script. Coranto is the successor to NewsPro.
From the Author
Coranto is your everyday Content Management System (CMS). It's designed to be flexible, and you can easily expand Coranto's functions by the use of a multitude of "snap-in" addons. Whether you run a small blog or a fully scaled newspaper with millions of hits every day, you can rely on Coranto's fully browser-based environment to update your site. The script also has its own forums for your support, questions and ideas.
Author website: http://www.coranto.org