Echo is a framework for developing object-oriented, event-driven Web applications. Echo removes the developer from having to think in terms of "page-based" applications and enables him/her to develop applications using the conventional object-oriented and event-driven paradigm for user interface development. Knowledge of HTML, HTTP, and JavaScript is not required. Echo is open-source software distributed under the terms of the Mozilla Public License or the GNU LGPL License.

URL: http://www.nextapp.com/platform/echo1/echo/
Licence: Mozilla Public License