Free compilers and interpreters

Scriptol is an object-oriented programming language that allows users to declare an XML document as a class.

MLton is an open source, whole-program optimizing compiler for the Standard ML (SML) programming language.

Clojure (pronunciation: /ˈkloʊʒɜːr/, like "closure"), or ClojureScript, is a dialect of the Lisp programming language created by Rich Hickey.

Go (often referred to as golang) is a free and open source programming language created at Google in 2007 by Robert Griesemer, Rob Pike, and Ken Thompson.

Scala (/ˈskɑːlɑː/ SKAH-lah) is a general-purpose programming language.

sed (stream editor) is a Unix utility that parses and transforms text, using a simple, compact programming language.

Simula is the name of two simulation programming languages, Simula I and Simula 67, developed in the 1960s at the Norwegian Computing Center in Oslo, by Ole-Johan Dahl and Kristen Nygaard.

Vala is an object-oriented programming language with a self-hosting compiler that generates C code and uses the GObject system.

Apache Groovy is an object-oriented programming language for the Java platform.

Objective-C is a general-purpose, object-oriented programming language that adds Smalltalk-style messaging to the C programming language.

R is a programming language and software environment for statistical computing and graphics supported by the R Foundation for Statistical Computing.

Ruby is a dynamic, reflective, object-oriented, general-purpose programming language.

Tcl (originally from Tool Command Language, but conventionally spelled "Tcl" rather than "TCL"; pronounced as "tickle" or "tee-see-ell") is a scripting language created by John Ousterhout.

(Not to be confused with Free Basics.) FreeBASIC is a multiplatform, free/open source (GPL) BASIC compiler for Microsoft Windows, protected-mode DOS (DOS extender), Linux, FreeBSD and Xbox.

IronPython is an implementation of the Python programming language targeting the .

OCaml (/oʊˈkæməl/ oh-KAM-əl), originally known as Objective Caml, is the main implementation of the Caml programming language, created by Xavier Leroy, Jérôme Vouillon, Damien Doligez, Didier Rémy, Ascánder Suárez and others in 1996.

Emacs Lisp is a dialect of the Lisp programming language used as a scripting language by the GNU Emacs and XEmacs text editors (which this article will refer to collectively as "Emacs").

Io is a pure object-oriented programming language inspired by Smalltalk, Self, Lua, Lisp, Act1, and NewtonScript.

m4 is a general-purpose macro processor included in all UNIX-like operating systems, and is a component of the POSIX standard.

colorForth is a programming language from the Forth language's original designer, Charles H.

Parser is a free server-side CGI web scripting language developed by Art.

Macintosh Common Lisp (MCL) is an implementation and IDE for the Common Lisp programming language.

Swift is a general-purpose, multi-paradigm, compiled programming language developed by Apple Inc.

Linden Scripting Language, or LSL, is the programming language used by residents of Second Life (SL), a virtual world by Linden Lab and similar virtual worlds.

Euphoria is a programming language originally created by Robert Craig of Rapid Deployment Software in Toronto, Canada.

CWEB is a computer programming system created by Donald Knuth and Silvio Levy as a follow-up to Knuth's WEB literate programming system, using the C programming language (and to a lesser extent the C++ and Java programming languages) instead of Pascal.

ICI is a general purpose interpreted, computer programming language originally developed by Tim Long in the late 1980s.

In computer programming, Yoix is a high-level, general-purpose, interpreted, dynamic programming language.

PHP4Delphi is a Visual Development Framework for creating custom PHP Extensions using Delphi.

Standard ML of New Jersey (SML/NJ) is a compiler and programming environment for Standard ML.

The PCASTL (an acronym for by Parent and Childset Accessible Syntax Tree Language) is an interpreted high-level programming language.

Yorick is an interpreted programming language designed for numerics, graph plotting, and steering large scientific simulation codes.

Chipmunk Basic is a freeware version of the BASIC programming language maintained by developer Ron Nicholson.

ActiveVFP (also known as AVFP) is a server-side scripting framework designed for Web development to produce dynamic Web pages.

SmallBASIC is a BASIC programming language dialect with interpreters released as free software under the GNU General Public License version 2.

The Extensible Embeddable Language (EEL) is a scripting and programming language in development by David Olofson.

Qore is an interpreted, high-level, general-purpose, garbage collected dynamic programming language, featuring support for code embedding and sandboxing with optional strong typing and a focus on fundamental support for multithreading and SMP scalability.

Algebraic Logic Functional programming language, also known as ALF, is a programming language which combines functional and logic programming techniques.

Ciao is a general-purpose programming language which supports logic, constraint, functional, higher-order, and object-oriented programming styles.