Phoca Open Graph System

Phoca Open Graph System Plugin is a Joomla! CMS Plugin. It allows adding of open graph information into site. Such information stored in meta tags can be then automatically displayed on e.g. Facebook

Be aware there are two different open graph plugins

Phoca Open Graph Content plugin - this plugin works for content (articles) and display information of articles

Phoca Open Graph Content Plugin
Joomla! Extension Directory - Phoca Open Graph Content Plugin

Phoca Open Graph System plugin - this plugin works for whole site except the content. This plugin was released due to missing open graph information on sites which were not produced by com_content component (articles)
http://www.phoca.cz/phoca-open-graph-system-plugin

Phoca Open Graph System Plugin

Since version 3.1.1 Tweets with Cards feature is available, see demo:

Phoca News