Apache is a free and open-source cross-platform web server software.
Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
cdnjs is a free distributed JS library delivery service.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
React is an open-source JavaScript library for building user interfaces or UI components.
Unpkg is a content delivery network for everything on npm.