Google Publisher Tag (GPT) is an ad tagging library with which you can dynamically build ad requests. GPT takes key details from you such as ad unit name, ad size, and custom targeting, builds the request, and displays the ad on web pages or mobile apps.
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
This website contains tracking information that allows admins to see Facebook Insights out of Facebook to this domain.
Google+ platform websites integration using the Google+ platform tag.
Let visitors recommend your content on Google Search and share it on Google+.
Identifies administrators for a page which will be able publish data to your wall if you like any content within this page.