Apache is a free and open-source cross-platform web server software.
Jetpack is a popular WordPress plugin created by Automattic, the people behind WordPress.com.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Page Builder by SiteOrigin makes it easy to build responsive grid-based page content that adapts to mobile devices with pixel perfect accuracy.
W3 Total Cache (W3TC) improves the SEO and increases website performance and reducing load times by leveraging features like content delivery network (CDN) integration and the latest best practices.
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.