Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Joomla is a free and open-source content management system for publishing web content.
Material Design Lite is a library of components for web developers.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.