Bootstrap is the most popular CSS Framework for developing responsive and mobile-first websites.
Gulp.js is an old but popular site building tool that automates various repetitive development tasks in web development, such as compiling Sass, minifying JavaScript, and optimizing images.
Material Design is a design system developed by Google that provides a set of guidelines, components, and tools for creating visually appealing and functional user interfaces. Material Design is designed to be flexible and customizable, making it a great choice for a wide range of applications and use cases.