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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.
http://kaolin.unice.fr/STk/
Gambit
A portable, high-performance implementation of Scheme based on an optimizing compiler by Marc Feeley. Developed at University of Montreal.
http://www.iro.umontreal.ca/~gambit/
Hotdog
A nearly R5RS compliant Scheme compiler with multiple backends, currently including .NET, JVM, and C. [Public Domain]
http://rover.cs.northwestern.edu/~scheme/
Scheme 48 User's Guide
HTMLized by Margaret Fleck, one of the authors of Envision.
http://www.cs.hmc.edu/~fleck/envision/sche...
Sizzle
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.
http://uebb.cs.tu-berlin.de/~magr/sizzle/s...
Stalin
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.
http://www.ece.purdue.edu/~qobi/software.h...
Dot-Scheme
PLT Scheme bridge to .NET framework; full access to .NET libraries, integrated exception handling, supports .NET delegates, can implement .NET interfaces in Scheme. Description, documents, downloads.
http://www.rivendell.ws/dot-scheme/
MIT Scheme
From MIT, for many systems, has comprehensive 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.
http://www.swiss.ai.mit.edu/projects/schem...
XLisp-Plus
Lisp version based on, and evolutionary improvement on, experimental XLisp.
http://www.almy.us/xlisp.html
Galapagos
An interactive multithreaded Scheme interpreter with turtle graphics for Windows 95, based on SCM.
http://www.cs.bgu.ac.il/~elad/GALAPAGOS/
Inlab 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.
http://www.inlab.de/scheme/
Infer Project
Statically-typed Scheme dialect, written in Infer, combines many of the best features of Scheme and ML. NSF funded.
http://www.cs.indiana.edu/~chaynes/infer.h...
SCM
A portable Scheme implementation written by Aubrey Jaffer.
http://www-swiss.ai.mit.edu/~jaffer/SCM.ht...
Pocket Scheme
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]
http://www.mazama.net/scheme/pscheme.htm
CMU AI Repository Free/Shareware Scheme Implementations
Yet more Scheme implementations from the CMU AI Repository. Many of these are also available from the Indiana University Scheme Repository.
http://www.cs.cmu.edu/afs/cs/project/ai-re...
T History
Fairly detailed, by Olin Shivers.
http://www.paulgraham.com/thist.html
SXM, CXEMA
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.
http://www.malgil.com/sxm/
scsh
A broad-spectrum systems-programming environment for Unix-like operating systems. Based on R5RS Scheme.
http://www.scsh.net/
RScheme
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]
http://www.rscheme.org/
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]
http://www.shiro.dreamhost.com/scheme/gauc...
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]
http://www.cs.unm.edu/~bap/oaklisp/
Lego/Scheme Compiler
For Lego MindStorms Robot kits, alternative to Visual Basic. Description, documents, downloads.
http://www.cs.indiana.edu/~mtwagner/legosc...
EuScheme Sources
Small implementation of Level 0 EuLisp, downloads in formats: tar, tgz, zip.
http://www.bath.ac.uk/~masrjb/Sources/
Larceny Project
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.
http://www.ccs.neu.edu/home/will/Larceny/
Elk Scheme: The Extension Language Kit
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.
http://sam.zoy.org/elk/
Chicken
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.
http://www.call-with-current-continuation....
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.
ftp://ftp.cs.indiana.edu/pub/scheme-reposi...
EdScheme
Interpreter for Macintosh or Windows. Has "friendly and convenient interactive programming environment" with language sensitive editor, full documentation. [commercial, free 14 day download]
http://www.schemers.com/edschem.html
Better Scheme
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.
http://www.cs.oberlin.edu/~jwalker/bscheme...
Narsi
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.
http://www.sciencething.org/geekthings/
KSM-Scheme
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.
http://square.umin.ac.jp/~hchang/ksm/
Indiana University Scheme Repository: Implementations
Even more Scheme implementations freely available from the Indiana U. repository.
http://www.cs.indiana.edu/scheme-repositor...
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.
http://www.plt-scheme.org/software/mzschem...
Chez Scheme
Reliable, high performance implementation, by Cadence Research Systems. Free version exists. [Commercial]
http://www.scheme.com/
Pseudoscheme
Embeds Scheme in Common Lisp.
http://www-swiss.ai.mit.edu/ftpdir/pseudo/
XLISP
A superset of the Scheme dialect of Lisp with extensions to support object-oriented programming.
http://www.mv.com/ipusers/xlisper/
TinyScheme
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]
http://tinyscheme.sourceforge.net/
VSCM
A portable Scheme implementation written by Matthias Blume of Princeton University. No longer actively developed.
http://www.cs.princeton.edu/~blume/vscm/
Scheme 48
Jonathan A. Rees's unofficial page: history, links, status.
http://mumble.net/~jar/s48/
Kali Scheme
A distributed implementation of Scheme that permits efficient transmission of higher-order objects such as closures and continuations.
http://community.schemewiki.org/kali-schem...
LispMe
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.
http://www.geocities.com/SiliconValley/Lab...
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.
http://www.kenrawlings.com/pages/Tachy
Schoca (Scheme for OCaml)
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]
http://home.arcor.de/chr_bauer/schoca.html
T Revival Project
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.
http://mumble.net/~campbell/t/t.html
T Project
History with: downloads, contributors, timeline, publications, influence, users, successors, Olin history errata. By Jonathan A. Rees.
http://mumble.net/~jar/tproject/
Unlikely Scheme
Small, standard-complying implementation, in C++. [Open source, zlib license]
http://marijn.haverbeke.nl/unlikely/
Petite Chez Scheme
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]
http://www.scheme.com/petitechezscheme.htm...
Scsh FAQ
The FAQ for Scsh, the Scheme Shell.
http://www-internal.alphanet.ch/~schinz/sc...
LispMe
Newer versions here. Scheme system for the Palm Pilot PDA developed by Fred Bayer.
http://www.lispme.de/lispme/index.html
Elk: Scheme-based Extension Language Kit
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.
http://www-rn.informatik.uni-bremen.de/sof...
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]
http://colin-smith.net/vx-scheme/
An Executable Denotational Semantics for Scheme
SchemeDS, as defined in R5RS. Program coded in R5RS Scheme. Description, documents, downloads. [AppSolutions Software Licensing]
http://www.appsolutions.com/SchemeDS/
Scheme Implementations and Mailing Lists
A list of Scheme implementations from the Scheme FAQ maintained by Mark Kantrowitz.
ftp://ftp.cs.indiana.edu/pub/scheme-reposi...
XLisp-Stat
Based on XLisp, but with built-in statistics support.
http://www.stat.uiowa.edu/~luke/xls/xlsinf...
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.
http://www.t3x.org/sketchy/
WinScm
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.
http://www.lifl.fr/~routier/enseignement/w...
DrScheme
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.
http://www.drscheme.org/
SIOD: Scheme in One Defun
Very small, portable implementation, has some database, Unix programming, CGI scripting extensions. Runs on DOS, Linux, Unix, Windows. Free source downloads.
http://people.delphiforums.com/gjc/siod.ht...
PC Scheme
Texas Instruments system for DOS OS; no longer maintained; download formats: source, executable/binary.
ftp://swiss-ftp.ai.mit.edu:/archive/pc-sch...
STklos
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.
http://www.stklos.org/
Scheme-to-C
DEC's venerable translator, runs on most anything with an ANSI C compiler.
http://ftp.cs.indiana.edu/pub/scheme-repos...
QScheme
A fast, small Scheme interpreter which is mostly compliant with the R5RS standard.
http://www.sof.ch/dan/qscheme/index-e.html
PLT Scheme
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.
http://www.plt-scheme.org/
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]
http://www-sop.inria.fr/mimosa/fp/Bigloo/
The Ksi Scheme Interpreter
Ksi is a portable, embeddable Scheme implementation written in C. Unfortunately its documentation is all in Russian at this point.
http://ksi.sourceforge.net/
Scheme 48
A small and portable implementation based on a bytecode interpreter designed to be used as a testbed for experiments in implementation techniques.
http://s48.org/
3DScheme
Two systems for Windows with built in "industrial-strength" solid modeler based on the ACIS solid modeler Geometric Modeling Kernel.
http://www.schemers.com/3dscm1.html
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2006