CSS

Cascading Style Sheets (CSS) is a simple mechanism for adding style (e.g.

C

One of the most widely used programming languages of all time

Unfancy JavaScript

Dynamic, functional language designed for building scalable and maintainable applications

A type inferred, functional reactive language that compiles to HTML, CSS, and JavaScript

5th major revision of the core language of the World Wide Web

An advanced purely-functional programming language

A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible

Lightweight, interpreted, object-oriented language with first-class functions

Text-to-HTML conversion tool/syntax for web writers, by John Gruber

(* Binary tree with leaves carrying an integer.

The primary programming language you use when writing software for OS X and iOS

A popular general-purpose scripting language that is especially suited to web development

Highly capable, feature-rich programming language with over 26 years of development

Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.

A dynamic, interpreted, open source programming language with a focus on simplicity and productivity

Scala is a pure-bred object-oriented language that runs on the JVM

Stylus Studio is a fully featured and comprehensive suite for editing and developing in XML.

Swift is a general-purpose, multi-paradigm, compiled programming language developed by Apple Inc. for iOS, macOS, watchOS, tvOS, Linux and z/OS.