xQuiD Core provides an Ajax framework to develop RIA in an easy way, enabling developers to concentrate on business requirements. xQuiD core is released under an open-source license, so you can use it freely with all the benefits implied by the existence of a community, where you can also contribute if you are an experienced developer.
To start using xQuiD core, you can download all JavaScript code in a compressed package ready for a production environment or access our subversion repository to get the uncompressed source code.
xQuiD Eclipse Plug-in provides a complete Integrated Development Environment based on xQuiD Core, powering developers productivity by adding drag & drop web 2.0 development capabilites to the Eclipse Platform. Although, by now, this plug-in is not open-source, you can download it "AS IS" and use it freely. If you like it and want to use it to achieve business goals, you'll be interested to know that comercial support is available.