Here is Java API available for free which can be used for accessing and modification of Document Object Model or DOM of browsers. Dubbed as Jaxcent 2 this is its second version and enables you to undertake Ajax operations on full scale and is free to run it on open internet. Even though Java runs on server side it gives the developers full control over the DOM hierarchy of the client whereas on the client side only a single JavaScript include statement needs to be added to the HTML content. On the server side it works with standard Java servlet containers offering classes corresponding to elements of DOM.

There is no requirement for rewriting existing applications and with the aid of Jaxcent one can add one or more Ajax features to pages without modification of structure or specification of the overall application. It is OS independent and works with Ajax capable browsers such as IE 6, IE 7 or Firefox. Click here to download Jaxcent for free.