ScorecardResearch is service of Full Circle Studies, Inc., is part of the comScore, Inc. market research community, a leading global market research effort that studies and reports on Internet trends and behavior. Here are all the website that put a pixel of Scorecard Research
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.
Spin.js dynamically creates spinning activity indicators that can be used as resolution-independent replacement for AJAX loading GIFs.
Open graph description entity tag
Open graph title entity tag
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.