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: 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.
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.
Elixir: A functional, concurrent, general-purpose programming language that runs on the Erlang VM
Nim: An imperative, multi-paradigm, compiled programming language
Dart: A general-purpose programming language used to build web, server, desktop, and mobile applications.
Reason NodeJs: Reason compiling to Nodejs (via Bucklescript)
Erlang: A general-purpose, concurrent, functional programming language
TypeScript: A typed superset of JavaScript.
Emacs Lisp (Elisp): Scripting language for the extensible text editor.
SQLite: Embedded SQL database engine.
Java: A concurrent, class-based, statically typed object-oriented language.
PHP CLI: A popular general-purpose scripting language.
Web
Game Development
Classic