Joomla is one of the best and most widely used CMS applications. It is suitable for creating corporate websites or intranets, online magazines, community-based portals and more. It has numerous build-in features as well as a large selection of extra modules and components which will enhance the value of your website and will enrich your visitors’ experience.
Drupal is another very popular, powerful and flexible content management system. Drupal is an open source content management platform powering millions of websites and applications. It’s built, used, and supported by an active and diverse community of people around the world.
WordPress is web software you can use to create a beautiful website or blog. We like to say that WordPress is both free and priceless at the same time. Because of its popularity and enormous community, it has evaluated a lot from its original purpose, and now you can use it for managing a complex content-driven website.
Frog CMS simplifies content management by offering an elegant user interface, flexible templating per page, simple user management and permissions, as well as the tools necessary for file management.
Mambo is a full-featured, award-winning content management system that can be used for everything from simple websites to complex corporate applications. Although some Mambo sites had already migrated to Joomla, but i think i should include Mambo as it is still a great CMS.