WordPress is a competent CMS to support SEO purposes. WordPress supports a templating system that offers lots of flexibility in rearranging widgets without editing HTML or PHP code and installing themes. It allows editing the HTML and PHP codes in themes to have more advanced customizations. Among the bells and whistles of WordPress, the most useful are clear permalink structure; integrate link management, tagging of articles and posts, ability to create multiple categories and multiple author capability. This CMS is supportive of the Trackback and Pingback standards to display links to other sites. With a rich plugin architecture, you can extend the functionality of WordPress to a great extent for your benefit.

Joomla is the most user-friendly CMS for multiple web-based applications. A free open source content management system used to publish content in the World Wide Web; it is a SEO friendly Web Application Development framework with features such as RSS feeds, news flashes, polls, blogs, website searching, language internationalization, page caching and printable versions of pages. It comprises of multiple different parts like Plugins, Components and Modules that make extensions and integrations easier tasks. There are as many as 4,000 extensions for use in Joomla. Performing tasks like building communities, translating content and creating URLs becomes easy with the application of Components.

The usability of SilverStripe as a CMS for SEO purposes is not to be sniffed at. Another free open source content management system designed and developed to create and maintain websites, this CMS supports a web-based administration panel to facilitate making modifications to websites. Among the remarkable functional features of SilverStripe are extensible web application-based interfaces, tree-based navigation structure, document revision control, highly comparable security, automatic database schema generation, meta data management, SEO friendly URLs, RSS feeds optimization, language internationalization, multiple templates for asset management and image resizing.

Drupal uses a back-end system to support several different sorts of websites from small personal blogs to large business sites. Drupal offers a lot when it comes to managing the on-page SEO aspects of a website. Drupal core the latest version of Drupal offers a myriad of bread and butter features including administration menus, customizable layout, RSS feeds, individual user accounts, flexible account privileges, internet forum and options to build an interactive community website. Drupal is an extremely flexible content management framework with a sophisticated programming interface. It supports basic website installation and administration without application of programming skills.