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Copyfree Works

The license status of some works may be more complex than it at first appears here. In some cases, the license status listed for a given work is the "primary" license under which it is distributed. In several cases, parts of the work may be distributed under other licenses -- potentially even non-copyfree licenses.

Where present, descriptions are typically drawn from the claims of the projects themselves, and represent neither claims nor opinions of the Copyfree Initiative. Inclusion here (with or without description) does not constitute, and should not be inferred as, endorsement of any project.

Listings are presented for informational purposes only, and no representation is made as to the accuracy or utility of any information provided. Use at your own risk.

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8ccpermalink

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8cc is a compiler for the C programming language, intended to support all C11 language features while keeping the code as small and simple as possible.

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Agdapermalink

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Agda is a dependently typed functional programming language, and a proof assistant.

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Alice MLpermalink

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Alice ML is a functional programming language based on Standard ML, extended with rich support for concurrent, distributed, and constraint programming.

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Apricotpermalink

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Apricot is a programming language inspired by Clojure and Lisp that runs on the Rubinius VM. Apricot code is compiled to Rubinius bytecode which allows it to call Ruby functions directly (and vice versa).

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AsyncScriptpermalink

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AsyncScript is an experimental language for asynchronous programming, based on actor model.

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CakeMLpermalink

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CakeML is a verified REPL interpreter implementation of a significant subset of Standard ML.

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Capuchinpermalink

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Capuchin is a JavaScript implementation for the Rubinius VM.

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cconspermalink

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The goal of ccons is to provide an interactive console for the C programming language, similar to what irb is for Ruby.

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ChakraCorepermalink

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ChakraCore is the core part of the Chakra JavaScript engine that powers Microsoft Edge.

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Checked Cpermalink

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Checked C is an extension to C that adds static and dynamic checking to detect or prevent common programming errors such as buffer overruns, out-of-bounds memory accesses, and incorrect type casts.

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CHICKENpermalink

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CINTpermalink

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CINT is a C and C++ interpreter with built-in debugger and class browser.

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Cleanpermalink

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Clean is a general purpose, state-of-the-art, pure, and lazy functional programming language designed for making real-world applications. Some of its most notable language features are uniqueness typing, dynamic typing, and generic functions.

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Clingpermalink

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Cling is an interactive C++ interpreter, built on the top of LLVM and Clang libraries.

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CMU Common Lisppermalink

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CMUCL is a high-performance, free Common Lisp implementation that runs on most major Unix platforms.

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Cobrapermalink

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Cobra is an object oriented .NET/Mono based programming language with clean, high-level syntax, and support for both static and dynamic binding.

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CoffeeScriptpermalink

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CoffeeScript is a little language that compiles into JavaScript. Underneath that awkward Java-esque patina, JavaScript has always had a gorgeous heart. CoffeeScript is an attempt to expose the good parts of JavaScript in a simple way.

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cprocpermalink

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Built on QBE, cproc is a C11 compiler implements most of the language and is capable of building software including itself, mcpp, gcc 4.7, binutils, and more. It was inspired by several other small C compilers including 8cc, c, lacc, and scc.

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Digital Mars Cpermalink

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DMC, the Digital Mars Compiler, is a one-step program to compile and link C++, C and ASM files, previously known as "sc".

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DMDpermalink

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D is a systems programming language with C-like syntax and static typing. It combines efficiency, control, and modeling power with safety and programmer productivity. DMD is the reference implementation compiler.

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Duktapepermalink

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Duktape is an embeddable JavaScript engine, easy to integrate into a C or C++ project, with a focus on portability and compact footprint.

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eC [1] [2]permalink

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The eC project provides an expressive and intuitive, C style, reflective object-oriented programming language as a superset of C, with a modern module system with restricted access control that can be used instead alongside traditional header files, and an extensible type system. It comes with the Ecere SDK, for cross-platform GUI, 2D/3D graphics and network programming support, an IDE, and more.

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Epigrampermalink

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Epigram is a dependently typed programming language and an interactive programming environment.

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ez-schemepermalink

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This is a simple educational scheme interpreter that runs on ruby 1.9.* or rubinius. Source code is easy to read and understand.

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Factorpermalink

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The Factor programming language combines powerful language features with a full-featured library. The implementation is fully compiled for performance, while still supporting interactive development. Factor applications are portable between all common platforms.

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Fancypermalink

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Fancy is a self-hosted general-purpose programming language inspired by Smalltalk, Ruby, Io and Erlang that runs on the Rubinius VM. It has first-class integration support with Ruby and any Ruby libraries supported by Rubinius, including most C-extensions. Fancy is a dynamic, pure object-oriented, class-based programming language with built-in support for futures and actors.

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Faypermalink

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Fay is a proper subset of Haskell that compiles to JavaScript, with fundamental datatypes based on what JavaScript can support, a foreign function interface to JavaScript, and support for calling Fay from JavaScript.

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Fubypermalink

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Fuby is a hybrid functional/object-oriented programming language with the same syntax as Ruby, although pretty different semantics in many aspects.

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Gauchepermalink

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Gauche is an R7RS Scheme implementation developed to be a handy script interpreter, which allows programmers and system administrators to write small to large scripts for their daily chores. Quick startup, built-in system interface, and native multilingual support are some of its goals.

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Glasgow Haskell Compilerpermalink

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GHC is a state-of-the-art, open source compiler and interactive environment for the functional language Haskell.

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Gopermalink

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Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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Godot [1]permalink

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Godot is a fully featured, open source, copyfree licensed game engine. It focuses on having great tools and a visual oriented workflow that can export to PC, Mobile, and Web platforms with no hassle. The editor, language, and APIs are feature rich, yet simple to learn, allowing you to become productive in a matter of hours.

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GW-BASICpermalink

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GW-BASIC is the old Microsoft implementation of the BASIC programming language interpreter for MS-DOS.

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HaMLetpermalink

HaMLet is a faithful and complete implementation of the Standard ML programming language (SML'97). It aims to be an accurate reference implementation of the language specification, a platform for experimentation with the language semantics or extensions to it, and a useful tool for educational purposes.

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Huiapermalink

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Huia is a whitespace-aware dynamic language with a simple object model based around traditional inheritance and closures.

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Idrispermalink

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Idris is a general purpose pure functional programming language with dependent types and features inspired by Haskell and ML. Dependent types allow types to be predicated on values, meaning that some aspects of a program’s behaviour can be specified precisely in the type. It is compiled, with eager evaluation.

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Idris LLVMpermalink

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Idris LLVM is LLVM-based code generation for the Idris programming language.

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Iopermalink

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Io is a dynamic prototype-based programming language focused on expressiveness through simplicity.

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Iokepermalink

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Ioke is a folding language. It allows you to write highly expressive code that writes code. Ioke allows you to create abstractions at any level, and expressiveness is the ultimate goal of the language.

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Janetpermalink

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Janet is a functional and imperative programming language and bytecode interpreter, that makes a good system scripting language, or a language to embed in other programs. It is a modern lisp, but lists are replaced by other data structures (arrays, tables (hash table), struct (immutable hash table), tuples). The language also supports bridging to native code written in C, meta-programming with macros, and bytecode assembly.

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Jeeves [1]permalink

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Jeeves is a programming language for automatically enforcing privacy policies. We have implemented it as an embedded domain-specific language in Python.

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Jeeves In Haskell [1]permalink

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Jeeves is a programming language for automatically enforcing privacy policies. This implementation was built in Haskell.

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Jsipermalink

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Jsi is a javascript interpreter with file/OS support and extensions for WebSocket, Sqlite, MySql, and more; sub-interpreter and introspection facilities; a web framework; and a debugger (command-line and Web-GUI). It also supports types and defaults.

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Juliapermalink

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Julia is a high-level, high-performance dynamic programming language for technical computing, with syntax that is familiar to users of other technical computing environments. It provides a sophisticated compiler, distributed parallel execution, numerical accuracy, and an extensive mathematical function library.

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Kittenpermalink

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Kitten is a statically typed, stack-based functional programming language designed to be simple and fast. It is a concatenative language, combining aspects of imperative and pure functional programming.

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laccpermalink

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The lcc project provides a small, self-hosting C compiler.

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Lambrapermalink

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Lambra is an experiment to implement a functional, distributed Lisp on the Rubinius Virtual Machine, much à la Erlang.

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Luapermalink

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Lua is a powerful, fast, lightweight, embeddable scripting language.

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Lupinpermalink

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Lupin is an implementation of Lua for the Rubinius VM.

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Mirandapermalink

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Miranda is a pure, non-strict, polymorphic, higher order functional programming language. A simpler language than Haskell, it inspired some of the design of that language.

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MLtonpermalink

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MLton is an open-source, whole-program, optimizing Standard ML compiler.

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MoonScriptpermalink

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MoonScript is a programmer friendly language that compiles to Lua.

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mrubypermalink

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Ruby creator Matsumoto Yukihiro's mruby is the lightweight, embeddable implementation of the Ruby language complying with part of the ISO standard.

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Myrddinpermalink

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Myrddin is a systems programming language that covers a similar niche as C including desktop, OS, and embedded development, but at the same time making it harder to shoot yourself in the foot.

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Mythrylpermalink

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Mythryl is an SML-derived language that aims to deftly combine C speed, Lisp power, and Ruby convenience with the critical new ingredients of Hindley-Milner typing, state of the art generics, and just the right level of side effects.

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Nekopermalink

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Neko is a high-level dynamically typed programming language that can be used as an embedded scripting language. Its VM has been designed to provide a common runtime for several different languages.

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Nicklepermalink

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Nickle is a programming language based prototyping environment with powerful programming and scripting capabilities. It supports a variety of datatypes, especially arbitrary precision numbers.

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Nimpermalink

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Nim (formerly known as "Nimrod") is a statically typed, imperative programming language that tries to give the programmer ultimate power without compromises on runtime efficiency. It offers an infix/indentation based syntax with a powerful hygienic macro system, a semantic model that supports a soft realtime GC on thread local heaps, and an unsafe shared memory heap for increased efficiency.

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Noscriptpermalink

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Noscript is an object-oriented, prototype-based language inspired by JavaScript, CoffeeScript, Self, IO, and our beloved Ruby.

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nwccpermalink

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Nils Weller's C Compiler, or "nwcc", is a simple C compiler for Unix systems targeting a variety of architectures.

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OctaScriptpermalink

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OctaScript is a LuaJIT bytecode-compiled language with support across a wide selection of editors, created for OctaForge scripting but usable as a stand-alone language as well.

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Onyxpermalink

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Onyx is a powerful stack-based, multi-threaded, interpreted, general purpose programming language similar to PostScript. It can be embedded as an extension language similarly to ficl (Forth), guile (scheme), librep (lisp dialect), s-lang, Lua, and Tcl.

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Papertpermalink

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Papert is a Logo implementation that runs in your browser.

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pdkshpermalink

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PD-ksh is a clone of the AT&T Korn shell. At the moment, it has most of the ksh88 features, not much of the ksh93 features, and a number of its own features.

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pForth [1]permalink

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Portable Forth, or pForth, is a public domain, portable ANS Forth based on a kernel written in ANSI C.

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Pharopermalink

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Pharo is a pure object-oriented programming language and a powerful environment, focused on simplicity and immediate feedback (think IDE and OS rolled into one).

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picocpermalink

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PicoC is a very small C interpreter for scripting. It was originally written as a scripting language for a UAV's on-board flight system. It's also very suitable for other robotic, embedded, and non-embedded applications.

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Poisonpermalink

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Poison is an interpretation of Potion on the Rubinius language platform.

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Ponypermalink

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Pony is an open-source, object-oriented, actor-model, capabilities-secure, high performance programming language.

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Portable C Compilerpermalink

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Pure Datapermalink

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Pure Data (aka Pd) is an open source visual programming language. Pd was created to further the Max paradigm by extending data processing to applications other than audio and MIDI, such as real-time video and web interaction.

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PureScriptpermalink

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PyPypermalink

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PyPy is a fast, compliant alternative implementation of the Python language (2.7.10 and 3.2.5).

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Quick Cpermalink

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Quick C, written in Myrddin, is a C frontend for the QBE backend.

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Racket [1]permalink

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Racket is a programming language with similarities to the Scheme (Lisp) family and a past close relationship to it, which specializes in education (ex. SICP, etc), metaprogramming / language design, and creation of higher-level domain-specific languages.

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Rasppermalink

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Rasp is an implementation of VBScript running on the Rubinius VM. It is "untested, undocumented, and ill-advised".

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Redpermalink

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Red is a homoiconic programming language strongly inspired by REBOL, with support for functional, imperative, and symbolic programming; prototype-based object support; low-level system programming; high-level scripting, including a REPL; and application embedded deployment.

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Reiapermalink

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Reia (pronounced RAY-uh) is a Ruby-like scripting language for the Erlang virtual machine (BEAM).

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rock [1]permalink

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The rock compiler is the reference implementation of ooc, a small programming language with a clear and concise syntax that compiles to C99.

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RSchemepermalink

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RScheme is an object-oriented, extended version of the Scheme dialect of Lisp that compiles to C, or to bytecode for virtual machine execution.

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Rubypermalink

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Ruby is a dynamic, open source programming language with a focus on software simplicity and developer productivity. It has an elegant syntax that is natural to read and easy to write.

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Rustpermalink

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Rust is a systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety.

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Scalapermalink

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Scala is a JVM language with seamless Java interop, type inference, class-based OOP facilities, and functional features like higher-order functions.

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sccpermalink

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Suckless C Compiler

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Scheme 48permalink

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Scheme 48 is a bytecode interpreted implementation of R5RS designed to be used as a testbed for experiments in implementation techniques and as an expository tool.

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SML/NJpermalink

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Standard ML of New Jersey (abbreviated SML/NJ) is a compiler for the Standard ML '97 programming language with associated libraries, tools, and documentation.

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Sonic Pipermalink

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Sonic Pi is a music synthesis programming language, simple enough for computing and music lessons, but powerful enough for professional musicians.

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Sprypermalink

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Spry is a programming language primarily inspired by Smalltalk, Rebol, Lisp, JavaScript, Forth, and Nim.

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Squeakpermalink

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Squeak is an open-source Smalltalk programming system with fast execution environments for all major platforms. It features the Morphic framework, which promotes low effort graphical, interactive application development and maintenance.

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Squirrelpermalink

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Squirrel is a high level imperative, object-oriented programming language, designed to be a light-weight scripting language that fits in the size, memory bandwidth, and real-time requirements of applications like video games.

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Steel Bank Common Lisppermalink

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Steel Bank Common Lisp (SBCL) is a high performance compiler and runtime system for ANSI Common Lisp. It provides an interactive environment including a debugger, a statistical profiler, a code coverage tool, and many other extensions.

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SubCpermalink

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SubC is a compiler for a (mostly) strict and sane subset of C as described in "The C Programming Language", 2nd Ed (also known informally as "ANSI C" or "C89").

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Symepermalink

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Syme is an implementation of Newspeak on the Rubinius VM. Newspeak is a programming language in the Smalltalk/Self tradition.

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Tclpermalink

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Tcl (Tool Command Language) is a very powerful but easy to learn dynamic programming language, suitable for a very wide range of uses, including web and desktop applications, networking, administration, testing and many more.

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TenDRApermalink

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TinyJSpermalink

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TinyJS aims to be an extremely simple (~2000 line) JavaScript interpreter, meant for inclusion in applications that require a simple, familiar script language that can be included with no dependencies other than normal C++ libraries.

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TinySchemepermalink

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TinyScheme is a lightweight Scheme interpreter that implements as large a subset of R5RS as was possible without getting very large and complicated. It is meant to be used as an embedded scripting interpreter for other programs. A lot of functionality in TinyScheme is included conditionally, to allow developers freedom in balancing features and footprint.

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Twelfpermalink

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Twelf is a language used to specify, implement, and prove properties of deductive systems such as programming languages and logics.

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Typhonpermalink

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Typhon is twisted Python, a Python implementation for the Rubinius VM, "just for fun".

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Utrecht Haskell Compilerpermalink

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UHC is the Utrecht Haskell Compiler. UHC supports almost all Haskell98 features plus experimental extensions.

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V Programming Languagepermalink

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The V programming language is a simple, fast, safe, compiled language for developing maintainable software.

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V8 [1]permalink

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V8 is a JavaScript engine originally released with the Chromium browser, but it has since been widely used as a stand-alone JavaScript implementation.

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Wenyan [1]permalink

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Wenyan, or 文言, is an esoteric programming language that closely follows the grammar and tone of classical Chinese literature. Moreover, the alphabet of wenyan contains only traditional Chinese characters and 「」 quotes, so it is guaranteed to be readable by ancient Chinese people.

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Wrenpermalink

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Wren is like Smalltalk in a Lua-sized package with a dash of Erlang and wrapped up in a familiar, modern syntax.

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Yabasicpermalink

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Yabasic is a traditional BASIC interpreter that comes with goto and various loops, and allows you to define subroutines and libraries. It supports simple graphics and printing. Yabasic can call out to libraries written in C, and allows you to create standalone programs.

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Yasmpermalink

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Yasm is a complete rewrite of the NASM assembler under the Revised BSD License.

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Ypsilon Schemepermalink

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Ypsilon is the implementation of Scheme Programming Language, which conforms to the latest standard R6RS* established in September 2007. Ypsilon achieves a remarkably short GC pause time and the best performance in parallel execution as it implements "mostly concurrent garbage collection", which is optimized for the multi-core CPU system.

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Zigpermalink

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Zig is a system programming language that prioritizes optimality, safety, and readability.

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