CORE Framework!

ImpressPages is a PHP framework with admin panel. A new MVC engine is under the hood so you can customize ImpressPages in no time. Write your own plugins and themes to suit your and customers’ needs best. Both website layout and administration interface are user friendly and simply gorgeous.

Many content management systems are focused on developer or site owner needs, but concrete5 is a CMS that truly delivers the best to both worlds. An in-context editing toolbar makes it easy to make changes as you navigate the live website. A truly MVC architecture and API make it easy for developers to truly use the CMS as building blocks.

Yii is a high-performance component-based PHP framework best for Web 2.0 development.Yii comes with rich features: MVC, DAO/ActiveRecord, I18N/L10N, caching, authentication and role-based access control, scaffolding, testing, etc. It can reduce your development time significantly.

Symphony is an XSLT-powered open source content management system

Sitefinity is a Web Content Management System that leverages the .NET 4.0 development patterns familiar to Microsoft developers. Sitefinity provides a convenient drag and drop interface for creating commercial websites, community portals and intranets. The system is completely open with all content exposed as REST-ful services and fluent API for easy programmability. Sitefinity can be easily integrated with external web applications, CRM systems, and marketing tools to power entire web-based businesses. »

phpSQLiteCMS is a simple and lightweight open source web content management system (CMS) based on PHP and SQLite. It's licensed under the GNU General Public License.phpSQLiteCMS is good if you want to quickly set up a small website without needing to spend a lot of time studying, installing and configuring (as SQLite is file-based, it just runs "out of the box"). But note that it is no large scale content management system - it's a tiny and simple one!

Wagtail is a content management system built on Django. It's focused on user experience, and offers precise control for designers and developers.

It is an open-source content management system (CMS) that is powered by PHP and MySQL. It does not only help you manage your personal blog but also maintain your postings at social networks. By establishing consistency among the data transmitted from and to the blog, this CMS sustains continuous harmonization of your data over time.

Dotclear is an open-source web publishing software created in 2002 by Olivier Meunier. A one mans project at first, Dotclear soon gathered a team comprising different personalities with various backgrounds.

Mypages is a multilingual website creator enabling creation and publication of unique sites. A creator with a visual website editor provides a very large extent of freedom in creation of websites, simultaneously remaining intuitive and easy to handle.

No-CMS, Free Open Source CodeIgniter based CMS (Content Management System) Framework with HMVC extension and groceryCRUD. No-CMS is quiet simple and easy to start with.

Bootstrap ready CMS for free. Just download and create kick-ass website in a few minutes.

Readz is a powerful and flexible browser-based CMS for building and managing responsive websites. Forget plugins and extensions. Readz comes fully equipped with all of the design, marketing, high-speed architecture, and integration tools needed to create fully optimized pages in just a few minutes.