Joomla! Plugin: CCC Socialmedia
Joomla Plugin to Display Open Graph and Twitter Options in your menu items and articles
This plugin creates a new tab in your menu items and your articles and enables you to add open graph and twitter data to your page. You can also set up global and/or fallback options in you plugin parameters.
This plugin also does recognize the useragents google, facebook and pinterest and delivers the right open graph image according to the useragent. So if google scrapes an image from your site, google will receive the squared image. If pinterest is checking on your site, it will get the protrait image and if facebook or other agents want to get your open graph image it will get the 1:1.91 ratio image.