XML

Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding…

C

One of the most widely used programming languages of all time

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

A non-repetitive alternative to YAML

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

An advanced purely-functional programming language

(JavaScript Object Notation) is a lightweight data-interchange format

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

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

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

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

The list maker.