Skimlinks is a content-to-commerce platform that helps publishers monetize their editorial content through affiliate marketing and the syndication of the resulting shopping-intent data to marketers. Their key products are SkimLinks, a product that turns product references into affiliated-shopping links, and Audiences by Skimlin...
ClustrMaps is a compact visitor tracker, designed for general web and blog use. They give you an easy way to show off your visitor locations.
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
Indicates that the site provides an interface specifically for searching the document and its related resources.
By adding rel="home" to a hyperlink, a page indicates that the destination of that hyperlink is the homepage of the site in which the current page appears.