Apache is a free and open-source cross-platform web server software.
Cloudways offers managed cloud-hosting services for WordPress sites on a cloud server where multiple copies of your content will be replicated throughout your chosen data center.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
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.