MariaDB is an open-source relational database management system compatible with MySQL.

PHP is a general-purpose scripting language used for web development.

Varnish is a reverse caching proxy.

Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.

Pantheon is a WebOps (Website Operations) and Management Platform for WordPress and Drupal.

Fastly is a cloud computing services provider. Fastly's cloud platform provides a content delivery network, Internet security services, load balancing, and video & streaming services.

Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.

Sites using the WordPress Block Editor, also known as Gutenberg.

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.

MySQL is an open-source relational database management system.

Google Analytics is a free web analytics service that tracks and reports website traffic.

Kadence Blocks is a plugin for WordPress that provides a collection of custom blocks for the WordPress Block Editor, allowing users to create custom layouts and designs for their website without needing to know how to code.

Kadence WP Kadence is a multipurpose WordPress theme that is available for free download and also offers a pro version.