Drupal is a modular content management system, forum, blogging and community engine. It is database driven and can be used with MySQL, MariaDB, PostgreSQL, and SQLite. Its features include (but are not limited to) discussion forums, Web-based administration, theme support, a submission queue, content rating, content versioning, taxonomy support, user management with a fine-grained permission system based on user roles (groups), error logging, support for content syndication, locale support, and much more. It is considered to be an excellent platform for developers due to its clean code and extensibility, and it can also be used as a Web application framework.
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.
WebGUI is a content management framework built to allow average business users to build and maintain complex Web sites. It is modular, pluggable, and platform independent. It was designed to allow the people who create the content to manage it online, rather than content management taking up the time of busy IT staff. WebGUI comes with a full host of features including shopping cart, subscriptions, forums, photo galleries, FAQs, link lists, blogs, SQL reports, a Web services interface, and a very configurable user privilege and profiling system.
Adaptive Website Framework (AWF) is a modern content management system and development framework. Most of its code is object-oriented and very easy to extend. It features support for multiple Web sites and languages, content versioning, caching, community portal functions (online list, forums, instant messages, newsletters, weblogs, wiki, etc.), image upload and galleries, a lexicon, a modular full-text search engine, an auto repair function for database tables, XML and PDF export, and RSS and LDAP support. Changes can be made on a preview site and published at a later time on the live site. Fully flexible URLs allow the replacement of existing static Web sites.
Midgard is a persistent storage framework. It provides an object-oriented and replicated environment for building data-intensive applications. It ships with a MidCOM content management system built on the Midgard framework. MidCOM's features include Web-based authoring WYSIWYG interfaces and a component interface for installing additional Web functionality. Midgard is built on the GNOME stack of libraries like GLib and libgda, and has language bindings for C, Python, and PHP. Communications between applications written in the different languages happen over D-Bus. The CMS runs on the LAMP (Linux, Apache, MySQL and PHP) platform.
P4A (PHP For Applications) a PHP5 RAD and object oriented PHP framework for building event-driven, stateful Web applications. It is based on Zend Framework and features tableless HTML, multiple databases, access key support, auto data type recognition, transparent AJAX, UTF-8, internationalization, and localization.
Xaraya is a fully dynamic, multi-platform content mangement solution. It utilizes robust permissions, data management, and multilingual systems to dynamically integrate and manage content. Its modular, database-independent architecture introduces tools which separate form, function, content, and design.
Asbru Web Content Management is an easy-to-use and inexpensive Web content management system. It runs on most major Web platform operating systems, databases, Web servers, and scripting languages. It is available in three editions: Personal (for individuals), Professional (for organizations), and Hosting (for Web hosting service providers).
MidCOM, the Midgard Components Framework, is an MVC framework for the Midgard persistent storage platform. It provides mechanisms for building a Web site using components without much need for writing code to glue all this together. The administration site gets built automatically by using those components. Goodies like a caching engine and sub-requests make site building even easier.