Jaiwls is a component oriented framework with bundled a servlet Web server (Jetty) and HTML widget library. It is easy to integrate in existing applications with static compiled Java classes and supports dynamic websites using Groovy, a runtime injectable singelton instance, well formatted stack traces, a low memory footprint for compiled projects, powerful URL rewrites possible, a production mode (with no recompilation) for Groovy-based applications, and much more.
RMI WebSocket provides a library for remote method invocations between a browser and a Jetty Web Server using the HTML5 WebSocket. The idea is to enable tight method-level integration between the user interface and the server so that patterns such as MVP (Model-View-Presenter) can be applied in a Web environment. The method-level communications between the browser code and the server code allows the developer to think about the Web page and server-side components as objects in a UML world. Details such as the over-the-wire protocols in WebSockets are abstracted away in the process.