Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Google Analytics is a free web analytics service that tracks and reports website traffic.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Typekit is an online service which offers a subscription library of fonts.
Umbraco is an open-source Microsoft ASP.NET based content management system.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.