Google Analytics is a free web analytics service that tracks and reports website traffic.
MailChimp for WordPress is an email marketing plugin that enables you to build subscriber lists.
Polylang is a WordPress plugin which allows you to create multilingual WordPress site.
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.