Echo framework – open-source Web framework for developing rich internet application
Echo framework is an open source web application framework for developing web-based object-oriented, event-driven applications.
From the developer’s perspective, Echo behaves as a user interface toolkit–like Swing or Eclipse SWT. Through the use of the swing model, Echo was able to employ concepts such as components and event-driven programming for improve the speed of user interface development.
Download : http://echo.nextapp.com/site/download