This plugin will help you to display Facebook Comments on your website. You can use Facebook Comments box on your posts/pages

Best plugin to manage HTML tags in your posts, pages and comments.

The easiest way to get the HTTP/HTTPS version of any URL.

This plugin allows you to add facebook open graph protocol to your WordPress website.

Saves the history of your WordPress site and provides automatic redirects.

Implements the Open Graph Protocol on a WordPress installation. Can be used by other plugins as a dependency.

The Open Graph protocol enables any web page to become a rich object in a social graph.

The Zend AMF interfaces contain everything you need for using Adobe's Action Message Format protocol in order to run Adobe Flex and Adobe AIR applications from your PHP 5 Wordpress installation.

The protocols.io Wordpress Publications Widget displays completely customizable and responsive publications from protocols.io, any user or any group.

This plugin allows you to add open graph meta tags to your WordPress website.

A simple plugin to allow Skype protocol in a link.