swiss-army knife of embeddable bookmarks. It can slice and dice elements on a page and present you with a freshly cut CSS selection for exactly the elements you wanted. If you’ve ever wasted time trying to pick out elements and digging around using Hpricot, jQuery, or Firebug (or worse), stop that and get this in your toolbar now.
cssess is a JS tool that helps find extra CSS rules on your site. It is designed to be used as a bookmarklet.
