Echo is an open-source framework for developing rich web applications using Java.
Echo2 is the current stable release of the Echo platform. Echo2 applications can be created entirely in server-side Java code using a component-oriented and event-driven API.
Echo is an open-source framework for developing rich web applications. From the developer's perspective, Echo behaves as a user interface toolkit--like Swing or Eclipse SWT. AJAX technology is employed to deliver a user experience to web clients that approaches that of desktop-based applications.