DMG Post Archives Widget

Display monthly archives as a list of links or a dropdown jump-menu (automatically navigate to page when selected).

Includes advanced options to display post counts, add CSS styles and modify the title.

Replaces the built in Archives Widget (WP_Widget_Archives).

A hook is available to filter the title: dmg_archives_widget_title.

For example, to change the title on a single page or post, you could add this to your functions.php file:

function myTitleFilter( $title ) {     if( is_singular() )     {         return "<strong>$title</strong>";     }     else     {         return $title;      
    } } add_filter( 'dmg_archives_widget_title' , 'myTitleFilter'); 

More information about this plugin can be found at http://dancoded.com/wordpress-plugins/archives-widget/.