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DrScheme - http://www.drscheme.org/
Full Scheme programming environment for Macintosh, many Unixes, Windows. Has module and object systems, platform-independent graphics. Ideal for beginners; one of the major design goals is a flexible teaching environment. |
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Bigloo - http://www-sop.inria.fr/mimosa/fp/Bigloo/
System with one goal: enable Scheme programming style where C(++) is usually needed; makes Scheme practical via features found in most normal languages but not Scheme and functional programming. Generators for C code, Java Virtual Machine, .NET bytecode. [Open Source, GPL] |
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PLT Scheme - http://www.plt-scheme.org/
Advocacy and authoring group, umbrella name for family of implementations: DrScheme (Scheme, MzScheme, MrEd); books: How to Design Programs, How to Use Scheme; and TeachScheme! project. University-based, supported by many volunteers writing code, documentation. |
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Chicken - http://www.call-with-current-continuation.org
A Scheme compiler which compiles a subset of R5RS into C. Uses the ideas presented in Baker's paper "Cheney on the MTA". It is highly portable, reasonably efficient and makes interfacing to C and C++ very easy. |
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Scsh - http://www.scsh.net/
Scheme Shell, broad-spectrum system programming environment for Unix, embedded in R5RS Scheme 48. Supports concurrent system programming, sophisticated I/O and automatic garbage collection for process resources. |
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MzScheme - http://www.plt-scheme.org/software/mzscheme/
Small, embeddable, scripting PLT Scheme implementation: R5RS compliant, full numerical tower, threads (all platforms), exceptions, modules, class-based objects, regular-expression matching, TCP/IP. For Macintosh, Unix, Windows 32-bit. |
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VSCM - http://www.cs.princeton.edu/~blume/vscm/
A portable Scheme implementation written by Matthias Blume of Princeton University. No longer actively developed. |
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STk - http://kaolin.unice.fr/STk/
R4RS Scheme interpreter with interface to access Tk graphical package; can be seen as a standard Tk package with Tcl replaced by a Scheme interpreter. Has efficient CLOS-like object-oriented system, STklos. |
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QScheme - http://www.sof.ch/dan/qscheme/index-e.html
A fast, small Scheme interpreter which is mostly compliant with the R5RS standard. |
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RScheme - http://www.rscheme.org/
Portable, extended Scheme with reflective object(-oriented) system, operating system services, modules, threads, many system programming features (integrates with, compiles to C or bytecodes) and useful extensions. [Open Source] |
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Pilo Visualization Tools for Scheme: PVTS - http://www.davidpilo.com/pvts/
Simple interpreter, runs on Java VM, with 3 visual aids/tools to support learning functional programming via Scheme; has viewers (environment, function call, cons-cell), i.e., global environment, recursive trees, linked list. Description, thesis, screenshots, download. Open source, GPL. |
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STklos - http://www.stklos.org/
Derived from STkn implementation based on an ad-hoc virtual machine, byte compiler; compilable as library to embed in other programs, has object system with MOP, multiple inheritance, generic functions, multimethods, module system, full R5RS tower of numbers, link to GTK+ X toolkit; almost R5RS compliant (in process), to support as many final SRFIs as possible, now supports SRFI-6. |
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Chez Scheme - http://www.scheme.com/
Reliable, high performance implementation, by Cadence Research Systems. Free version exists. [Commercial] |
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Pocket Scheme - http://www.mazama.net/scheme/pscheme.htm
For MIPS, SH3, ARM-based Windows CE devices. Supports Aubrey Jaffer's SLIB, has initialization file for same, parenthesis-balancing text editor. Windows NT version exists. [Open Source, Artistic License] |
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Scheme 48 - http://s48.org/
A small and portable implementation based on a bytecode interpreter designed to be used as a testbed for experiments in implementation techniques. |
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Gauche - http://practical-scheme.net/gauche/
An R5RS Scheme implementation developed to be a handy script interpreter. Quick startup, built-in system interface, native multilingual support. [Open source, BSD license] |
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Gambit - http://dynamo.iro.umontreal.ca/~gambit/
A portable, high-performance implementation of Scheme based on an optimizing compiler by Marc Feeley. Developed at University of Montreal. |
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Elk Scheme: The Extension Language Kit - http://sam.zoy.org/elk/
New site. Embeddable, reusable extension language subsystem for programs coded in C/C++, also a useful standalone Scheme implementation with interfaces to POSIX, Unix, X11. |
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Scheme 48 - http://mumble.net/~jar/s48/
Jonathan A. Rees's unofficial page: history, links, status. |
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Galapagos - http://www.cs.bgu.ac.il/~elad/GALAPAGOS/
An interactive multithreaded Scheme interpreter with turtle graphics for Windows 95, based on SCM. |
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SIOD: Scheme in One Defun - http://people.delphiforums.com/gjc/siod.html
Very small, portable implementation, has some database, Unix programming, CGI scripting extensions. Runs on DOS, Linux, Unix, Windows. Free source downloads. |
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XLISP - http://www.mv.com/ipusers/xlisper/
A superset of the Scheme dialect of Lisp with extensions to support object-oriented programming. |
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Larceny Project - http://www.ccs.neu.edu/home/will/Larceny/
Simple, efficient Scheme run-time system, for SPARC architecture. Petit Larceny is portable and emits C, for Linux (Intel IA32), Macintosh OS X (PowerPC), Solaris (SPARC), Windows. Common Larceny runs on Microsoft Common Language Runtime (CLR), emits MS IL not native or C code. |
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MIT Scheme - http://www.swiss.ai.mit.edu/projects/scheme/
From MIT, for many systems, has code library, includes most functionality of ANSI Standard Common Lisp (CLtL2), many low-level OS interactions. Distributed with system is LIAR (LIAR Imitates Apply Recursively), optimizing compiler that outputs native machine code, has Edwin interactive Emacs-derived editor written in pure Scheme and the subject of an MIT AI Lab Memo. Arguably one of the best Scheme systems available, unarguably one of largest. Major downfall: its not totally R5RS compliant, more so for hygienic macros and #f versus the empty list. Version 7.5 now available for x86 systems. |
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T Project - http://mumble.net/~jar/tproject/
History with: downloads, contributors, timeline, publications, influence, users, successors, Olin history errata. By Jonathan A. Rees. |
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Indiana University Scheme Repository: Implementations - http://www.cs.indiana.edu/scheme-repository/imp.html
Even more Scheme implementations freely available from the Indiana U. repository. |
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Elk: Scheme-based Extension Language Kit - http://www-rn.informatik.uni-bremen.de/software/elk/
Old site, last update 1997. Embeddable, reusable extension language subsystem for applications written in C/C++, also a useful standalone Scheme implementation with interfaces to POSIX, Unix, X11. |
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CMU AI Repository Free/Shareware Scheme Implementations - http://www.cs.cmu.edu/afs/cs/project/ai-repository/ai/lang/scheme/impl/0.html
Yet more Scheme implementations from the CMU AI Repository. Many of these are also available from the Indiana University Scheme Repository. |
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Petite Chez Scheme - http://www.scheme.com/petitechezscheme.html
A complete Scheme system that is fully compatible with Chez Scheme but uses high-speed threaded interpreter technology in place of Chez Scheme's incremental native-code compiler. [Freeware] |
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Pico - http://pico.vub.ac.be/
Tiny, expressive; made to teach advanced computer science ideas to non-computer science students; mixes power of languages like Scheme, with standard infix notation known from calculus. Has: garbage collected tables (arrays), higher order functions, objects, meta programming, reflection. |
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T History - http://www.paulgraham.com/thist.html
Fairly detailed, by Olin Shivers. |
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3DScheme - http://www.schemers.com/3dscm1.html
Two systems for Windows with built in "industrial-strength" solid modeler based on the ACIS solid modeler Geometric Modeling Kernel. |
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EdScheme - http://www.schemers.com/edschem.html
Interpreter for Macintosh or Windows. Has "friendly and convenient interactive programming environment" with language sensitive editor, full documentation. [commercial, free 14 day download] |
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The Ksi Scheme Interpreter - http://ksi.sourceforge.net/
Ksi is a portable, embeddable Scheme implementation written in C. Unfortunately its documentation is all in Russian at this point. |
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Tachy - http://www.kenrawlings.com/pages/Tachy
Scheme-like language coded in C# for .NET framework. First implementation is interpreter, compiler is planned. Main focus: programming language learning, experiment. Kept as small (now under 1000 lines) and simple as possible. Open source, BSD license. |
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KSM-Scheme - http://square.umin.ac.jp/~hchang/ksm/
A R5RS Scheme interpreter which integrates with C, allowing calling of C functions and accessing C variables from Scheme. It provides a mechanism to load C shared libraries. It runs on x86 and PowerPC based Linux systems. |
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XLisp-Plus - http://www.almy.us/xlisp.html
Lisp version based on, and evolutionary improvement on, experimental XLisp. |
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XLisp-Stat - http://www.stat.uiowa.edu/~luke/xls/xlsinfo/node1.html
Based on XLisp, but with built-in statistics support. |
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SXM, CXEMA - http://www.malgil.com/sxm/
Portable Scheme implementation, conforms to IEEE/ANSI standard, supports all features of R5RS Report, many features of Chez Scheme and various SRFIs. Derived from XScheme: object system dropped, many changes, additions. |
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Kali Scheme - http://community.schemewiki.org/kali-scheme/
A distributed implementation of Scheme that permits efficient transmission of higher-order objects such as closures and continuations. |
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LispMe - http://www.lispme.de/lispme/index.html
Newer versions here. Scheme system for the Palm Pilot PDA developed by Fred Bayer. |
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OScheme - http://koala.ilog.fr/abaird/oscheme/oscheme.html
Small, embeddable interpreter, mostly Scheme R4RS compliant, with extensions: supports prototype-based object model, some POSIX system calls, compilable in secure mode. Description, download, links. |
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TinyScheme - http://tinyscheme.sourceforge.net/
Based on Mini-Scheme, tiny implementation, almost a full R5RS Scheme. Goal: embedded scripting use, but works as standalone interpreter and extensible shell tool. Recent changes reduced executable size to about 64KB on Linux/x86. [BSD] |
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Vx-scheme - http://colin-smith.net/vx-scheme/
A compact (<64 Kb) implementation of R4RS Scheme that compiles for VxWorks/Tornado (and is integrated with the system symbol table). [Open source, Artistic License] |
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Sketchy - http://www.t3x.org/sketchy/
Interpreter for pure functional applicative Scheme dialect, a variant of pure LISP plus global definitions (define), first-class continuations (call/cc), input/output functions (read, write, ...). Downloads: source, binaries. Sells: tutorial, reference manual. |
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Narsi - http://www.sciencething.org/geekthings/
Portable scheme interpreter by Britt Park. Other free software: Cdoc, simple program to generate pretty TeX output from annotated C/C++ code. Userblock, simple user space block device driver kit for Linux. UVFS, user space filesystem kit. |
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Scsh FAQ - http://www.alphanet.ch/~schinz/scsh-faq/scsh-faq_toc.html
The FAQ for Scsh, the Scheme Shell. |
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Oaklisp - http://www.bcl.hamilton.ie/~bap/oaklisp/
Object-oriented Scheme dialect with first-class types, multiple inheritance, lexically distributed method definitions. based on bytecode emulator, yet reasonably fast. Description, downloads, bibliography. [Open Source, GPL] |
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EuScheme Sources - http://people.bath.ac.uk/masrjb/Sources/
Small implementation of Level 0 EuLisp, downloads in formats: tar, tgz, zip. |
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WinScm - http://www2.lifl.fr/~routier/enseignement/winscm/winscmeng.html
Scheme environment for Windows 3.1/95; interpreter independent, though defaults to Jaffer's SCM. Used at University of Lille 1, France, for introductory programming course. Free downloads. English, Française. |
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LispMe - http://www.geocities.com/SiliconValley/Lab/9981/main.html
Fred Bayers home page is really the home of this Scheme for 3COM Pilot PDA systems: compiler and runtime system intended mainly as a tool to quickly try ideas and algorithms, but can write dialog-based applications. |
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Unlikely Scheme - http://marijn.haverbeke.nl/unlikely/
Small, standard-complying implementation, in C++. [Open source, zlib license] |
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An Executable Denotational Semantics for Scheme - http://www.appsolutions.com/SchemeDS/
SchemeDS, as defined in R5RS. Program coded in R5RS Scheme. Description, documents, downloads. [AppSolutions Software Licensing] |
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Pseudoscheme - http://mumble.net/~jar/pseudoscheme/
Embeds Scheme in Common Lisp. |
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Scheme-to-C - http://ftp.cs.indiana.edu/pub/scheme-repository/imp/Scheme-to-C/
DEC's venerable translator, runs on most anything with an ANSI C compiler. |
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Scheme 48 User's Guide - http://www.cs.hmc.edu/~fleck/envision/scheme48/user-guide.html
HTMLized by Margaret Fleck, one of the authors of Envision. |
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Infer Project - http://www.cs.indiana.edu/~chaynes/infer.html
Statically-typed Scheme, written in Infer, combines many of the best features of Scheme and ML; polymorphic. NSF funded. Description, draft manual. |
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Inlab Scheme - http://www.inlab.de/scheme/
A commercial Scheme which is freely available for non-commercial use on Linux and FreeBSD. It has support for several features like bitmap/greymap processing and can be used as a general tool for image processing, OCR or specialized optical object and pattern recognition. |
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T Revival Project - http://mumble.net/~campbell/t/t.html
Scheme dialect and implementation, incompatible with R5RS, but an R3RS compatibility layer exists; to grow more compatible with R5RS over time. Description, manual, downloads, mail list, IRC, contacts, plans. |
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Schoca (Scheme for OCaml) - http://sourceforge.net/projects/chesslib
An implementation of the Scheme language in OCaml. The primary purpose of Schoca is the use as an embedded extension language in OCaml applications. [Open source, GPL] |
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Sizzle - http://uebb.cs.tu-berlin.de/~magr/sizzle/sizzle.en.html
A Scheme interpreter implemented as a library which can be embedded into C programs, as well as a standalone interpreter. Mostly R5RS, Guile compatible, and includes regular expressions and most Posix functions. |
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SCM - http://www-swiss.ai.mit.edu/~jaffer/SCM.html
A portable Scheme implementation written by Aubrey Jaffer. |
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Better Scheme - http://www.cs.oberlin.edu/~jwalker/bscheme/
Language designed and largely implemented, now a matter of coding, documenting. Goals: high consistency; improve language's functional nature; consistency with lambda calculus; optimize, but not at cost of other goals. |
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T - ftp://ftp.cs.indiana.edu/pub/scheme-repository/imp/t/
Scheme-like language developed at Yale; is to Scheme rather as NIL is to Lisp; mainly of interest to historians and theoreticians. FTP for v3.1. |
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Stalin - http://www.cis.upenn.edu/~screamer-tools/home.html
A powerful optimizing Scheme compiler from Jeffery Mark Siskind at the NEC Research Institute. Sacrifices functions such as call/cc in favor of efficiency, but generated code is remarkably bulletproof and fast. |