* The GWT SDK provides a set of core Java APIs and Widgets. These allow you to write AJAX applications in Java and then compile the source to highly optimized JavaScript that runs across all browsers, including mobile browsers for Android and the iPhone. * Constructing AJAX applications in this manner is more productive thanks to a higher level of abstraction on top of common concepts like DOM manipulation and XHR communication. * You can debug AJAX applications in your favorite IDE just like you would a desktop application, and in your favorite browser just like you would if you were coding JavaScript. The GWT developer plugin spans the gap between Java bytecode in the debugger and the browser’s JavaScript. * GWT contains two powerful tools for creating optimized web applications. The GWT compiler performs comprehensive optimizations across your codebase — in-lining methods, removing dead code, optimizing strings, and more. By setting split-points in the code, it can also segment your download into multiple JavaScript fragments, splitting up large applications for faster startup time. * When you’re ready to deploy, GWT compiles your Java source code into optimized, stand-alone JavaScript files that automatically run on all major browsers, as well as mobile browsers for Android and the iPhone.

* With Application Express, you can focus on the problem at hand. Much of the development process is managed for you: security, authentication, database interactions, input validation, session state management and many other dependencies work out of the box. All the tools you need are available in a single, extensible platform, which runs as a part of the Oracle Database. * Application Express offers all the tools you need to be productive: a modern browser-based IDE, drag and drop layouting, sophisticated code editing, and a rich property editor. Whether you are a citizen developer, or an experienced enterprise developer, Application Express minimizes the complexity involved with multi-faceted applications. * Customize your Application's UI without writing a single line of CSS or Javascript. You can change everything from the way one button looks to the entire theme of the app, with a few points and clicks. All widgets and styles provided by Application Express have been tested extensively, meaning that your app will look good no matter what device or browser you use. Application Express delivers a built-in suite of 35 sample applications. They can be copied, edited, and used as a basis for the applications you want to develop, or as a quick solution for your business's needs.