Feature: PHP 5.3
HTMLy

HTMLy is an open source databaseless blogging platform. The Flat-File Blog and Flat-File CMS written in PHP.
Mara CMS

Mara CMS performs a similar core function to 'Content management systems' like Drupal or Wordpress - although it differs in many fundamental aspects from those packages. Probably the most significant difference is its being file based instead of database dependent.
Monstra

Monstra is a modern and lightweight Content Management System. It is Easy to install, upgrade and use.
Pulse

Pulse CMS is the easiest way to build and deploy a responsive, content managed website.