WonderCMS is a completely free open source Content Management System, or in other words, a free website builder.

PopojiCMS is one of the content management system created with a simple concept to facilitate each individual to manage the website. With the concept of joint and native php oop, ordinary web developers can quickly understand the structure of the engine PopojiCMS.

TwistPHP is an open-source web framework.

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

SilverStripe CMS is an open source web content management system used by governments, businesses, and non-profit organisations around the world. It is a power tool for professional web development teams, and web content authors rave about how easy it is to use.

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".

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.

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

Adult Java Hosting packages on Linux Servers.

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

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

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

JSP Hosting on Linux Servers.