Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Hashnode is a free developer blogging platform that allows you to publish articles on your own domain and helps you stay connected with a global developer community.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
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.
Medium is an online publishing platform.
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.
Quora Pixel is a tool that is placed in your website code to track traffic and conversions.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
Varnish is a reverse caching proxy.