Google Web Toolkit - Google Code

Google Web Toolkit (GWT) makes it easier to write high-performance AJAX applications. You write your front end in the Java programming language and GWT compiles your source into highly optimized JavaScript. Writing web apps today is a tedious and error-prone process. You spend 90% of your time working around browser quirks, and JavaScript's lack of modularity makes sharing, testing, and reusing AJAX components difficult and fragile. It doesn't have to be that way.

* Load faster than hand-written JavaScript apps

* Use smaller, more compact, cacheable code

* Automatically support IE, Firefox, Mozilla, Safari, and Opera

* Use the browser's "back" button correctly

* IDEs that you love like Eclipse, IntelliJ, and NetBeans

* Full-featured debugging, with variable watches and breakpoints

* Unit tests (based on JUnit) both in a debugger and in a browser

* Built-in UI components serve as cross-browser building blocks for your app

* RPC helps with client-server interaction

* JavaScript Native Interface (JSNI) simplifies integrating GWT code with existing JavaScript code