Use Jumpchart to quickly plan out the navigation of your site by adding pages, and sub-pages. If you change your mind, easily drag pages to new spots within the site hierarchy.

You can use simple Textile formatting to add text, files, special formatting, and even forms to the pages of your wireframe.

Wireframes are great, but Jumpcharts are better. A Jumpchart is shareable, exportable as clean CSS, and automatically generates its own sitemap.