Apache is a free and open-source cross-platform web server software.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
Jetpack is a popular WordPress plugin created by Automattic, the people behind WordPress.com.
Lightbox is small javascript library used to overlay images on top of the current page.
Performance plugin from the WordPress Performance Group, which is a collection of standalone performance modules.
Prototype is a JavaScript Framework that aims to ease development of web applications.
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.