Bootstrap is the most popular CSS Framework for developing responsive and mobile-first websites.

A landing page is a standalone web page designed to promote a specific product, service, or offer. Landing pages are used in marketing campaigns to drive conversions and increase revenue, and typically include a clear call to action, minimal distractions, and a focus on the benefits of the product or service.

A template or theme refers to a pre-designed layout or structure that provides a basic framework for building a specific type of application or website. It typically includes good design, placeholder content and functional features, allowing developers to customize and fill in the details according to their specific needs.

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.