Powerful and simple online compiler, IDE, interpreter, and REPL. Code, compile, and run code in 50+ programming languages: Clojure, Haskell, Kotlin (beta), QBasic, Forth, LOLCODE, BrainF, Emoticon, Bloop, Unlambda, JavaScript, CoffeeScript, Scheme, APL, Lua, Python 2.7, Ruby, Roy, Python, Nodejs, Go, C++, C, C#, F#, HTML, CSS, JS, Rust, Swift, Python (with Turtle), Django, Express, Sinatra, Ruby on Rails, R, Next.js, GatsbyJS, React, Bash, Quil, Crystal, Julia, Elixir, Nim, Dart, Reason NodeJs, Erlang, TypeScript, Pygame, Love2D, Tkinter, Java Swing, Emacs Lisp (Elisp), PHP Web Server, SQLite, Java, PHP CLI, Pyxel

Command-line program to download videos from YouTube.com and other video sites - ytdl-org/youtube-dl