Zimplit: Easiest CMS For Simple Websites
Zimplit is a ridiculously easy to use free CMS application which is ideal for simple websites.
There is no standard admin panel. A toolbox appears after logging in & you start editing the website.
You can add images, links, edit the HTML of a page and copy a page to use it as a template for a new page.
It requires PHP 4.3+ to run & no databases required.
The application needs CHMOD 777 on all files for editing them. Since they are HTML files (except zimplit.php), it does not sound very bad.