Nette Framework is an open-source framework for creating web applications.

Drupal is an open-source platform and content management system for building dynamic web sites offering a broad range of features and services including user administration, publishing workflow, discussion capabilities, news aggregation, metadata functionalities using controlled vocabularies and XML publishing for content sharing purposes.

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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.

FuelPHP is an open source web application framework written in PHP which implements the HMVC pattern.

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

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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.

LogicalDOC is a free document management system that is designed to handle and share documents within an organization.

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

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Magnolia is an open-source digital business platform with a content management system (CMS) at its core.

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

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.