Apple Pay is a mobile payment and digital wallet service by Apple that allows users to make payments in person, in iOS apps, and on the web.
Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
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.
Klarna Checkout is a complete payment solution where Klarna handles a store's entire checkout.
MasterCard facilitates electronic funds transfers throughout the world, most commonly through branded credit cards, debit cards and prepaid cards.
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.
Shopware is an enterprise-level ecommerce platform.
A modest JavaScript framework for the HTML you already have.
Trusted Shops is a company that acts as a 3'rd party representing the common interests of both consumers and retailers.