WordPress
This CMS has the largest market share among its competitors. It began as a blogging platform but has developed into a full tool with plugins and themes to choose from. WordPress offers a top-notch experience when it comes to content management. It supports user registration, gets regular updates and has a helpful community.
Key features include intuitive publishing and content management options; powerful editor that lets you format your content and high customizable thanks to many plugins and themes.
Joomla
Joomla is known as a flexible CMS. It has a great option that lets you manage multiple custom post types and is great if you want to run a website that does not have a lot of text content. It has a lot of options for user management and offers multilingual support. You can use multiple themes or templates at once.
Key features include: excellent support for custom post types; many user management options; multilingual support and unique templates for each page type.
In case you’re using the multilingual website support of Joomla to create multilingual website versions for different countries, you can use website translation services to help you manage your multilingual website content.
Drupal
Drupal is well known as the most flexible system for dealing with custom post types. It has a high degree of access for users and permissions. It is taxonomy system is very powerful and is considered one of the most secure platforms.
Key features include: custom post creation and management system; offers advanced user management and permission settings; support for multilingual sites; details taxonomy system; and a high level of security.
Serendipity
Serendipity is a very user-friendly CMS that is perfect for small blogs. It is a lightweight CMS. It offers plugins, themes and has a built-in dynamic caching setting.
Key features include: great for performance-oriented websites; access to large selection of plugins and themes; and offers customization of website.
Typo3
This CMS offers fantastic scalability and caters to enterprise-level websites. It is user-friendly and best suited to users with experience of web development. It offers multilingual support too. Key features include support for multilingual websites; great for enterprise-level sites; allows multiple site management in single installation; allows for sharing of data and tools.