Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.
PHP is a general-purpose scripting language used for web development.
Twenty Ten is the default WordPress theme for 2010.
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.