Design prototypes and more with Axure

I heard about a tool which seems to be helpful to design prototypes that help design web applications when functionalities are still not final.

You drag and drop components and generate prototypes or specifications (word), with no programming. The generated code of the prototype is HTML and JavaScript.

I believe it is a good alternative to a static prototype that has been coded by hand in HTML. But I guess other tools like Dreamweaver can help making prototypes with better designs.

For quick and interactive designs with the customer, i also heard good things about the Powerpoint prototyping toolkit. Also, these series on building a complete web app from scratch seem like a must-read.

Links :

http://www.guuui.com/issues/02_06.php

http://www.axure.com/

It is not a free tool but it is not too expensive. I played with it a bit, here are a few screenshots :