Apache is a free and open-source cross-platform web server software.
Cloudflare Browser Insights is a tool that measures the performance of websites from the perspective of users.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.