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Cascade Framework is a free CSS framework for creating websites and web apps.

Backbone.js is a JavaScript library with a RESTful JSON interface and is based on the model–view–presenter (MVP) application design paradigm.

Blosxom is a free-software weblog program (and simple content management system) written in Perl.

TwistPHP is an open-source web framework.

JsPHP is a cross-browser JavaScript library designed to make the PHP application programming interface (API) available in JavaScript environments.

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

sNews is a completely free, standards compliant, PHP and MySQL driven Content Management System. sNews is extremely lightweight, simple and customizable. It's easy to install, and easy to use via a simple web interface. sNews consists of only one core engine file, one independent template file and its accompanying CSS stylesheet file, plus an .htaccess file that makes all URLs search engine friendly.

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

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

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

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

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

Google Web Toolkit, or GWT Web Toolkit, is an open source set of tools that allows web developers to create and maintain complex JavaScript front-end applications in Java.

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.

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