Web Directory

» 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

» 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/

» 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/

» 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.
   http://www-sop.inria.fr/mimosa/fp/Bigloo/

» 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-repository/ai/lang/scheme/impl/0.html

» Chez Scheme
   Reliable, high performance implementation, by Cadence Research Systems. Free version exists. [Commercial]
   http://www.scheme.com/

» 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.org

» 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

» 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/

» 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/software/elk/

» EuScheme Sources
   Small implementation of Level 0 EuLisp, downloads in formats: tar, tgz, zip.
   http://people.bath.ac.uk/masrjb/Sources/

» Gambit
   A portable, high-performance implementation of Scheme based on an optimizing compiler by Marc Feeley. Developed at University of Montreal.
   http://dynamo.iro.umontreal.ca/~gambit/

» 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://practical-scheme.net/gauche/

» Indiana University Scheme Repository: Implementations
   Even more Scheme implementations freely available from the Indiana U. repository.
   http://www.cs.indiana.edu/scheme-repository/imp.html

» 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 pat
   http://www.inlab.de/scheme/

» 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/

» 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-scheme/

» 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 I
   http://www.ccs.neu.edu/home/will/Larceny/

» LispMe
   Newer versions here. Scheme system for the Palm Pilot PDA developed by Fred Bayer.
   http://www.lispme.de/lispme/index.html

» MIT 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 mach
   http://groups.csail.mit.edu/mac/projects/scheme/

» 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/

» 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.bcl.hamilton.ie/~barak/oaklisp/

» PC Scheme
   Texas Instruments system for DOS OS; no longer maintained; download formats: source, executable/binary.
   ftp://swiss-ftp.ai.mit.edu/pub/pc-scheme/

» 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.html

» Pico
   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, objec
   http://pico.vub.ac.be/

» Pilo Visualization Tools for Scheme: 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, screensh
   http://www.davidpilo.com/pvts/

» 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

» Pseudoscheme
   Embeds Scheme in Common Lisp.
   http://mumble.net/~jar/pseudoscheme/

» QScheme
   A fast, small Scheme interpreter which is mostly compliant with the R5RS standard.
   http://www.sof.ch/dan/qscheme/index-e.html

» Racket
   Programming language suitable for implementation tasks ranging from scripting to application development, and supporting the creation of new programming languages. It includes the DrRacket programming environment, a virtual machine with a just-in-time com
   http://www.racket-lang.org/

» SCM
   A portable Scheme implementation written by Aubrey Jaffer.
   http://people.csail.mit.edu/jaffer/SCM.html

» 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.html

» 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/

» 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/

» Scheme 48
   Jonathan A. Rees's unofficial page: history, links, status.
   http://mumble.net/~jar/s48/

» Scheme 48 User's Guide
   HTMLized by Margaret Fleck, one of the authors of Envision.
   http://www.cs.hmc.edu/~fleck/envision/scheme48/user-guide.html

» 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-repository/doc/misc/scheme_2.faq

» Scheme-to-C
   DEC's venerable translator, runs on most anything with an ANSI C compiler.
   http://ftp.cs.indiana.edu/pub/scheme-repository/imp/Scheme-to-C/

» 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://sourceforge.net/projects/chesslib/

» Scsh
   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.
   http://www.scsh.net/

» Scsh FAQ
   The FAQ for Scsh, the Scheme Shell.
   http://www.alphanet.ch/~schinz/scsh-faq/scsh-faq_toc.html

» 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-repository/imp/t/

» T History
   Fairly detailed, by Olin Shivers.
   http://www.paulgraham.com/thist.html

» T Project
   History with: downloads, contributors, timeline, publications, influence, users, successors, Olin history errata. By Jonathan A. Rees.
   http://mumble.net/~jar/tproject/

» 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

» 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/

» 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/

» Unlikely Scheme
   Small, standard-complying implementation, in C++. [Open source, zlib license]
   http://marijn.haverbeke.nl/unlikely/

» VSCM
   A portable Scheme implementation written by Matthias Blume of Princeton University. No longer actively developed.
   http://sourceforge.net/projects/vscm/

» 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/

» 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://www2.lifl.fr/~routier/enseignement/winscm/winscmeng.html

» XLISP
   A superset of the Scheme dialect of Lisp with extensions to support object-oriented programming.
   http://www.xlisp.org/

» XLisp-Plus
   Lisp version based on, and evolutionary improvement on, experimental XLisp.
   http://www.almy.us/xlisp.html

» XLisp-Stat
   Based on XLisp, but with built-in statistics support.
   http://www.stat.uiowa.edu/~luke/xls/xlsinfo/node1.html