Google+ platform websites integration using the Google+ platform tag.
The Tweet Button is a small widget which allows visitors to share content and connect on Twitter.
Disqus is a networked community platform, reaching over 900 million people a month, 1.8 million registered communities, and over 300M active commenters. The service offers a networked comment system used to foster engagement and connect audiences from around the web. Disqus looks to make it very easy and rewarding for people ...
Open graph description entity tag
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.