Gatsby is a React-based open-source framework with performance, scalability and security built-in.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
React is an open-source JavaScript library for building user interfaces or UI components.
Statamic is an open-source and self-hosted content management system based on the PHP programming language.