Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Drupal Commerce is open-source ecommerce software that augments the content management system Drupal.
Drupal is a free and open-source web content management framework.
Etracker is a web optimisation solution.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.