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

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.

ProcessWire is a free PHP5 content management system and framework (open source CMS/CMF) built to save you time and work the way you do.

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.

TwistPHP is an open-source web framework.

Twig.js is a pure JavaScript implementation of the Twig PHP templating language.

Geeklog is a PHP/MySQL based application for managing dynamic web content.

ImpressPages CMS is user friendly software. Its tools enable user to manage the content of website in a convenient way. The advantage of ImpressPages is the opportunity to see how the website which is being edited will look like after the changes.

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

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.

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.

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

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

JSP Hosting on Linux Servers.

dotCMS is an open source content management system (CMS) written in Java for managing content and content driven sites and applications.

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