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

Meteor, or MeteorJS, is a free and open-source isomorphic JavaScript web framework[3] written using Node.js.

Contao is an open source content management system (CMS) for people who want a professional internet presence that is easy to maintain.

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

SproutCore is an open-source JavaScript web framework.

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

Bludit is a simple web application to make your own blog in seconds, it's completly free and open source. Bludit uses flat-files (text files in JSON format) to store the posts and pages, you don't need to install or configure a database.

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.

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

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

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

JSP Hosting on Linux Servers.

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

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".

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.