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.
Instant.Page is a JavaScript library which uses just-in-time preloading technique to make websites faster.
Open Graph is a protocol that is used to integrate any web page into the social graph.