Vexi is a rich GUI platform for creating desktop-like Internet or intranet applications using an intuitive XML/JavaScript API and an extensible widget set with themes, JSON support. Communicate with servers using XMLRPC/SOAP/REST and runs on Java.
Integrate the power of the fully AJAX enabled technology of ICEfaces into the framework of the ESRI WebADF. No need to code in Javascript or to handle XML communication to build AJAX functionalities. OnlineDemo: http://www2.pch.etat.lu/pchViewer