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SilverStripe CMS is an open source web content management system used by governments, businesses, and non-profit organisations around the world. It is a power tool for professional web development teams, and web content authors rave about how easy it is to use.

SiteCake is a drag and drop CMS for simple websites. It lets you publish the content just by dragging it to your web page. It's CMS for static websites, with few pages only, to cover the niche below WordPress level of complexity.

Laravel is a free, open-source PHP web framework, intended for the development of web applications following the model–view–controller (MVC) architectural pattern.

PRADO is an open source, object-oriented, event-driven, component-based PHP web framework.

Textpattern is a web application designed to help overcome the hurdles to publishing online, and to simplify the production of well-structured, standards-compliant web pages.

Website Baker is a PHP-based Content Management System (CMS) designed with one goal in mind: to enable its users to produce websites with ease.

Chaplin is an architecture for JavaScript applications using the Backbone.js library.

Enyo is a JavaScript app framework enabling developers build native-quality HTML5 apps that run everywhere — from phones and tablets to PCs and TVs.

Chyrp is a blogging engine designed to be very lightweight while retaining functionality. It is powered by PHP and has very powerful theme and extension engines, so you can personalize it however you want.

XWiki is a free wiki software platform written in Java with a design emphasis on extensibility.

OpenKM is a Free/Libre document management system that provides a web interface for managing arbitrary files.

Ametys is a free and open source content management system (CMS) written in Java.

dotCMS is an open source content management system (CMS) written in Java for managing content and content driven sites and applications.

Apache Roller is a Java-based Open Source "full-featured, Multi-blog, Multi-user, and group-blog server suitable for blog sites large and small".

eXo Platform is an open source, standard-based, Enterprise Social Collaboration Platform written in Java.

OpenWGA is Web Content Management computer software running on the Java Enterprise Edition Platform.

Liferay makes software that helps companies create digital experiences on web, mobile and connected devices.

SmartClient is set of mobile and cross-browser HTML5 UI components combined with a Java-based Ajax framework, created by Isomorphic Software to build business web applications.

OpenCms is an open source content management system written in Java.