Smart Navigation Widgets is plugin with 3 widgets ideal for bloggers or any other WordPress users with big archives. Using this plugin, you can display AJAX powered archive widget that shows only small portion of archives to user, and allows him to navigate deeper only when he needs to. No more long lists of date archives that take up a lot of space, or endless list of categories and pages. Plugin is designed for use with hierarchical taxonomies (like category) and hierarchical post types (like pages). But, with some extra options you can allow use of non-hierarchical taxonomies and post types.
Plugin Price: $11.00
Plugin on CodeCanyon:
http://codecanyon.net/item/smart-navigation-widgets/3702563
Plugin Home Page:
http://www.millan.rs/product/smart-navigation-widgets/