ConceptDraw WebWave 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 on the stage of web site/application prototyping and design, page mocking-up and site-mapping. ConceptDraw WebWave includes more than 4590 ready-made graphics, shapes, templates and wizards for quickly creating professional diagrams and drawings. The application runs both on PC and Macintosh and allows seamless files exchange and provides obvious benefits to individual and corporate users.
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
more features...