Apache is a free and open-source cross-platform web server software.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
Open Graph is a protocol that is used to integrate any web page into the social graph.
WP-Statistics is a WordPress plugin which allows you to know your website statistics.
WPML plugin makes it possible to build and run fully multilingual WordPress sites.
Yoast SEO Premium is a search engine optimisation plugin for WordPress and other platforms.