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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.

The Google Closure Library is a broad, well-tested, modular, and cross-browser JavaScript library.

jCore server is the core system on which you can build your jCore client sites.

PyroCMS is an easy to use, powerful, and modular CMS and development platform built with Laravel 5.

The PHP Smart.Framework (smart framework php) is a free, BSD licensed, open-source web framework that claims to fit small, medium as well as large web projects.

Grav is a Fast, Simple, and Flexible file-based Web-platform. Although Grav follows principles similar to other flat-file CMS platforms, it has a different design philosophy than most. The underlying architecture of Grav is built using well established and best-in-class technologies.

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.

Leafpub is an open source blogging platform with inline editing, handlebar templates, and a beautiful user interface.

Nucleus CMS is a flexible and easy to install content management system, aka blog software. It helps you to publish a website and lets writers do what they are best at: writing items or articles, without having to worry about formatting and markup.

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

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".

Adult Java Hosting packages on Linux Servers.

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.

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

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

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