I use WordPress to build great websites, as well as bespoke ecommerce sites (with Woocommerce). I also use WordPress as a modern headless CMS solution.
GatsbyJS enables developers to create modern, secure, fast & SEO-approved websites. Great for Headless WordPress projects!
ReactJS is a great JavaScript library which I’ve used on a range of applications.
For more standard ecommerce websites, I use Shopify.
GraphQL is a modern and very fast method for loading data into a website. Much better and quicker than using REST in my experience.
GSAP is a brilliant JavaScript library for creating high-performance animations on the web.