The Tweet Button is a small widget which allows visitors to share content and connect on Twitter.
Identifies administrators for a page which will be able publish data to your wall if you like any content within this page.
Spin.js dynamically creates spinning activity indicators that can be used as resolution-independent replacement for AJAX loading GIFs.
Open graph description entity tag
A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".
A scheme.org entity that represents a person (alive, dead, undead, or fictional).