Apache is a free and open-source cross-platform web server software.

Ruby is an open-source object-oriented programming language.

cdnjs is a free distributed JS library delivery service.

Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.

Unpkg is a content delivery network for everything on npm.

JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.

jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.

Ruby on Rails is a server-side web application framework written in Ruby under the MIT License.

Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside a web browser.

Webpack is an open-source JavaScript module bundler.

React is an open-source JavaScript library for building user interfaces or UI components.

Envoy is an open-source edge and service proxy, designed for cloud-native applications.

Next.js is a React framework for developing single page Javascript applications.