HTML (HyperText Markup Language) is the most basic building block of the Web. It describes and defines the content of a web page
Cascading Stylesheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language.
Responsive design is an approach to web design aimed at allowing web pages to be viewed in response to the size of the screen or web browser one is viewing with.
JavaScript is a prototype-based, multi-paradigm, dynamic language, supporting object-oriented, imperative, and declarative (e.g. functional programming) styles
jQuery is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers
Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web. Download Bootstrap