Apache is a free and open-source cross-platform web server software.
Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Sass is an extension of CSS that enables you to use things like variables, nested rules, inline imports and more.
TYPO3 is a free and open-source Web content management system written in PHP.