Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Cloud CDN uses Google's global edge network to serve content closer to users.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Qualaroo provides surveys on websites and apps to get user feedback.
Sentry is an open-source platform for workflow productivity, aggregating errors from across the stack in real time.