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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.

cdnjs is a free distributed JS library delivery service.

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

HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.

MySQL is an open-source relational database management system.

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

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

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

Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.

WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.

Reveal CSS animation as you scroll down a page.

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