Apache is a free and open-source cross-platform web server software.
Kadence WP Blocks is a plugin for WordPress that provides a collection of custom blocks for the Gutenberg editor, allowing users to create custom layouts and designs for their website without needing to know how to code.
PHP is a general-purpose scripting language used for web development.
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.