cdnjs is a free distributed JS library delivery service.
Emotion is a library designed for writing CSS styles with JavaScript.
Moment.js is a free and open-source JavaScript library that removes the need to use the native JavaScript Date object directly.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
SiteGround is a web hosting service.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.