Modernizr is a JavaScript library which is designed to detect HTML5 and CSS3 features in various browsers, which lets JavaScript avoid using unimplemented features or use a workaround such as a shim to emulate them.

MochiKit is a light-weight JavaScript library written and maintained by Bob Ippolito.

MODX helps you take control of your online content. An Open Source PHP application framework, it frees you to build sites exactly how you want and make them 100% yours. Zero restrictions and fast to build. Super-simple templates in regular HTML/CSS/JS (any lib you want). Registered user systems and a killer community. Welcome to web-building nirvana.

Enyo is a JavaScript app framework enabling developers build native-quality HTML5 apps that run everywhere — from phones and tablets to PCs and TVs.

LifeType supports multiple blogs and users, media management, generation of standard content, clean URLs and support for subdomains. LifeType is released under the GPL license, and requires PHP and MySQL to work.

Storytlr offers a single touch point for your online life in your own style. Easily post anything you find interesting, import your web 2.0 stuff and share your life online.

Java Hosting packages on Linux servers.

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.

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

Private JVM hosting with pre-installed Tomcat server.

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

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.

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

JSP Hosting on Linux Servers.