This widget makes it easy for your site users to drill down into your Wordpress post categories.

This widget makes it easy for your site users to drill down into your Wordpress custom-post taxonomies.

This wordpress plugin provides a tagcloud that shows tags depending of the current context (e.g. Category, Author, Tag, Post) only. The tag-links of the cloud can be restricted to the current category or current selected tag, like a drill down navigation. The style, sizes and the conditions where the widget should be visible, are configurable.