Apache is a free and open-source cross-platform web server software.
mod_wsgi is an Apache HTTP Server module that provides a WSGI compliant interface for hosting Python based web applications under Apache.
OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.
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.
Python is an interpreted and general-purpose programming language.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.