From the site description: ConceptDraw WebWave is a web-site architecture tool that has been specially developed for professional webdesigners, webmasters, developers, architects and management staff for webdesign companies. The product is an essential tool for web site/application prototyping and design, page mocking-up and site-mapping.
From the time of posting this, you have 21hours and 30 minutes to dowload and install the software; the unpack gives a free license key. Be sure to read all the files in the download
find out more about it at http://www.conceptdraw.com/en/products/webwave/main.php
Key features:
Website file structure scanner;
Powerful drawing tools;
Extended export/import;
Autoconnectors and Smart objects;
MS Visio support;
Quick-start wizards;
Alpha-channel (transparency)
Webpage real behavior imitation;
Colors scheme generator;
Site prototype builder;
Task-specific templates;
Collections of ready shapes;
Multipage document support
MySQL support
Generates site maps
Analyses existing web structures ...
etcetera, etcetera and etcetera