cdnjs is a free distributed JS library delivery service.
Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Umami is a self-hosted web analytics solution. It's goal is to provide a friendlier, privacy-focused alternative to Google Analytics and a free, open-sourced alternative to paid solutions.
Unpkg is a content delivery network for everything on npm.