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.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Twitch is an American video live streaming service that focuses on video game live streaming, including broadcasts of esports competitions.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.