Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.

Apache Traffic Server is an open-source caching and proxying server that serves as an HTTP/1.1 and HTTP/2 reverse proxy with caching capabilities, load balancing, request routing, SSL termination, and support for advanced HTTP features.

Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.

WebSocket is a communication protocol that provides full-duplex communication channels over a single, long-lived connection, enabling interactive communication between web browsers and servers.

LiteSpeed is a high-scalability web server.

PHP is a general-purpose scripting language used for web development.

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.

jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.

OWL Carousel is an enabled jQuery plugin that lets you create responsive carousel sliders.

YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.