Ariadne is a Web Application Framework and Content Management System built with PHP. It allows you to build complex Web applications and sites with ease. It takes care of the mundane stuff like internationalization, security, user management, templating, data retrieval and storage, caching, and site management. It stores content in a structured object store that can be accessed through an extensive filesystem-like API.
Foswiki is wiki software, supporting the editing of Web pages in an ordinary Web browser by end users. What makes Foswiki special is that it supports the embedding of active and passive macros that enhance the page content (e.g. with global or dynamic information) and allow end-users to build applications that store and process data in a structured manner.
WebsiteBaker is an easy, secure, flexible, and extensible content management system. Templates can be created within minutes and are powered by (X)HTML, CSS, and jQuery. Droplets provide a new and revolutionary way of inserting PHP code everywhere you want. Many extensions are available and can be installed and used with two clicks. A flexible API is also provided.
TomatoCMS is a powerful content management system. Its key feature is its Layout Editor and widget concepts. TomatoCMS also supports plugins/hooks, templates/skins, multiple languages, and has high performance. It supports a modular architecture with more than 10 built-in modules, such as ad, category, comment, menu, multimedia, news, poll, tag, and upload.