Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Google Cloud Trace is a distributed tracing system that collects latency data from applications and displays it in the Google Cloud Console.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
A modest JavaScript framework for the HTML you already have.
Unpkg is a content delivery network for everything on npm.
Wufoo is an online form builder that creates forms including contact forms, online payments, online surveys and event registrations.