Popular
Python: A dynamic language emphasizing readability.
Nodejs: Evented I/O for v8 Javascript.
C: Low-level and cross-platform imperative language.
Java: A concurrent, class-based, statically typed object-oriented language.
C++: A general purpose system programming language.
Ruby: A natural dynamic object-oriented language.
HTML, CSS, JS: The languages that make up the web.
Scheme: An elegant dynamic dialect of Lisp.
Go: Statically typed yet expressive language with a focus on concurrency.
Rust: A fast and safe systems programming language.
Practical
Clojure: A modern JVM-based Lisp dialect with a focus on immutability
Haskell: An advanced, purely functional programming language
Kotlin (beta): Statically typed programming language interoperable with Java and Android
Scheme: An elegant dynamic dialect of Lisp.
Lua: A lightweight multi-paradigm scripting language.
Python 2.7: A dynamic language emphasizing readability.
Ruby: A natural dynamic object-oriented language.
Python: A dynamic language emphasizing readability.
Nodejs: Evented I/O for v8 Javascript.
Go: Statically typed yet expressive language with a focus on concurrency.
C++: A general purpose system programming language.
C++11: A general purpose system programming language.
C: Low-level and cross-platform imperative language.
C#: A Microsoft .NET programming language.
F#: A Microsoft .NET functional programming language.
Rust: A fast and safe systems programming language.
Swift: A modern general-purpose programming language from Apple.
Python (with Turtle): A dynamic language emphasizing readability.
R: a programming language and environment for statistical computing and graphics
bash: The classic Unix shell
Crystal: Fast as C, slick as Ruby
Julia: A language for high-performance numerical analysis and computational science.
Nim: An imperative, multi-paradigm, compiled programming language
Reason NodeJs: Reason compiling to Nodejs (via Bucklescript)
TypeScript: A typed superset of JavaScript.
Emacs Lisp (Elisp): Scripting language for the extensible text editor.
Java: A concurrent, class-based, statically typed object-oriented language.
PHP CLI: A popular general-purpose scripting language.
Web
Framework
Django: Python framework that encourages rapid development.
Express: Javascript framework designed for building web applications and APIs.
Sinatra: DSL for quickly creating web applications in Ruby with minimal effort
Ruby on Rails: A web-application framework that includes everything needed to create web applications
Next.js: A lightweight framework for static and server‑rendered React applications
GatsbyJS: Blazing-fast static site generator for React
React: A JavaScript library for building user interfaces
React Typescript: A JavaScript library for building user interfaces
React Reason: Reason bindings for ReactJS
Game Development
Classic