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MODX helps you take control of your online content. An Open Source PHP application framework, it frees you to build sites exactly how you want and make them 100% yours. Zero restrictions and fast to build. Super-simple templates in regular HTML/CSS/JS (any lib you want). Registered user systems and a killer community. Welcome to web-building nirvana.

Jamroom is a community content management system. It enables you to bring your entire community online to participate in your websites content creation.

Plesk is a commercial web hosting platform with a control panel that allows a server administrator to set up new websites, reseller accounts, e-mail accounts, and DNS entries through a web-based interface.

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.

Tiki is a CMS/Groupware which offers a large number of features "out-of-the-box" arguably more than any other Open Source Web Application. It can be overwhelming, even to an experienced user or administrator.

Rico 2.0 – open source JavaScript library for developing rich Internet applications (RIAs).

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.

qooxdoo is a universal JavaScript framework with a coherent set of individual components and a powerful toolchain.

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.

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

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

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

Java Hosting packages on Linux servers.

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".

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

Hippo CMS is an open-source, dual licensed, Content Management System.