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.
Lodash is a JavaScript library which provides utility functions for common programming tasks using the functional programming paradigm.
PHP is a general-purpose scripting language used for web development.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
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.