Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
OXID eShop Community Edition is a free, open source ecommerce solution built using object oriented programming and PHP.
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.