Rialto – an Ajax-enabled web application toolkit
Rialto is a specially designed to provide ease the access to Rich Internet application development for corporate developers to develop only corporate web applications and not internet web sites. Ideally a Rialto developer have neither need to write or understand DHTML, Ajax, DOM code or RIA concepts. it also allow you to develop single page application, and is available under the open source Apache License.
Download : rialto-js-1.1.0.zip