Apache is a free and open-source cross-platform web server software.
Emotion is a library designed for writing CSS styles with JavaScript.
Gatsby is a React-based open-source framework with performance, scalability and security built-in.
Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.
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.
React is an open-source JavaScript library for building user interfaces or UI components.