by LordPretender on WordPress.org
Simple Hierarchical Sitemap is the simple way to add an HTML sitemap to your wordpress blog...

An example of a sitemap.
By using a shortcode or PHP function, this plugin generates and HTML Code which is displayed in your page or anywhere you want.
It displays pages and posts sorted hierarchically in their categories.
The generated page will give an easy navigation for your users and is SEO user frendly.
The shortcode [simple_hierarchial_sitemap] has optional parameters :
Parameters can be used together.