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.https://getbootstrap.com
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.https://www.google.com/tagmanager
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.https://jquery.com
Nginx (Web servers, Reverse proxies)
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Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.https://nginx.org/en
