IBDOM is a JavaScript framework that enables the easy injection of data contained in JS objects, and collections of JS Objects, into HTML, XHTML, and XML Documents, via the DOM. Enables keeping Markup away from JS. Can be used with DWR or RJS Templates.
J2J provides an intuitive way to convert Java to JSON and JSON to Java. Annotate any Java class then use JsonWriter to emit JSON from java or JsonReader to convert JSON to java objects. (source code and tutorial included) Version 2.0 in development.