Websites using Spree Commerce as their e-commerce platform. Spree is an open source e-commerce platform powered by the Ruby on Rails.
Stores based on all versions of Magento. Magento is the eCommerce software and platform trusted by the world's leading brands. Grow your online business with Magento
A pingback is one of four types of linkback methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to, or referring to their articles.
Open graph description entity tag
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook
Sites who has this tag are verfied by google to use WebMaster tools
A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".