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

Google Analytics is a free web analytics service that tracks and reports website traffic.

reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.

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.

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.

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

Google Sign-In is a secure authentication system that reduces the burden of login for users, by enabling them to sign in with their Google account.

Unpkg is a content delivery network for everything on npm.

PHP is a general-purpose scripting language used for web development.

Amazon Web Services (AWS) is a comprehensive cloud services platform offering compute power, database storage, content delivery and other functionality.

Amazon S3 or Amazon Simple Storage Service is a service offered by Amazon Web Services (AWS) that provides object storage through a web service interface.

Fly is a platform for running full stack apps and databases.

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