Live demo: Using GatsbyJS to Build a Decoupled (Drupal) Website Live Demo - what could possibly go wrong - building a decoupled website using Drupal as the content source and GatsbyJS for the frontend.
Back to the Future: No More Static Mockups! Sending PSDs and PDFs and Sketch files to clients is setting yourself up for failure. Send them a URL.
Getting Started Creating Apps with Drupal and Ionic Framework A short introduction to creating a hybrid app using Drupal for the backend and Ionic Framework for the frontend.