AngularJS is a JavaScript-based open-source web application framework led by the Angular Team at Google.
Contentful is an API-first content management platform to create, manage and publish content on any digital channel.
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.
Varnish is a reverse caching proxy.