Apache is a free and open-source cross-platform web server software.
Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
FreeBSD is a free and open-source Unix-like operating system.
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.