Widget Attributes Wordpress Plugin - Rating, Reviews, Demo & Download
Plugin Description
This plugin is intended to be used by theme authors that need to have custom attributes for the widgets so they can define common classes for similar widgets, etc.
When activated, you’ll get two additional input fields in the widget configuration forms, where you can assign a custom ID and classes for the widgets.
Please note that before the attributes are saved, they will be passed through sanitize_html_class() so all blacklisted characters will be stripped.