SWI-Prolog
Stable and free standard Prolog implementation. Targeted primarily at research and education. Windows, Linux and Unix versions available. Comes with a visual debugger and a GUI environment.
url: www.swi-prolog.org/
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ALS Prolog
Applied Logic Systems, Inc. provides a full-featured, Edinburgh-style Prolog compiler with GUI tools for Unix, Windows and Macintosh platforms.
url: www.als.com/
Amzi! Prolog + Logic Server
This extensible Prolog version runs under Windows, Linux, Solaris and HP/UX, supporting development of client and server applications embeddable in the web, C/C++, Java, Delphi, Visual Basic and other environments. An IDE is available for Windows along with an interpreter-based tutorial.
url: www.amzi.com/
Aquarius Prolog 1.0
The compiler for this open-source version developed at UCB is built around the Berkeley Abstract Machine, a finer-grained rendition of WAM. An interpreter provided for program development is written in Prolog.
url: www.info.ucl.ac.be/people/PVR/aquarius.html
Arity/Prolog
With a compiler and interpreter written in Prolog, C and assembly language and representing a superset of Edinburgh Prolog, a programming environment is offered for Windows/NT.
url: www.arity.com/www.pl/products/ap.htm
BinProlog
BinNet Corporation offers a high-performance, robust Prolog system able to generate C/C++ code and standalone executables and providing high-level networking along with secure internet programming integrated with rule-based reasoning components.
url: www.binnetcorp.com/BinProlog/
B-Prolog
Free, compact, full CLP system that runs Prolog and CLP(FD) programs. Emulator based, performance similar to SICStus-Prolog. Runs on: FreeBSD, Linux, Solaris, SunOS, Unix, Windows 9x/NT/2000.
url: www.sci.brooklyn.cuny.edu/~zhou/bprolog.html
Brain Aid Prolog
Based on Edinburgh Prolog and extended with object-oriented mechanisms, this Berkeley-style open-source system has a compiler written in Prolog and generating Transputer assembly code.
url: www.comnets.rwth-aachen.de/~ost/private.html
Ciao Prolog Development System
Full ISO-Prolog compliant system, modular design allows language restriction and extension. Descriptions, contacts, mail lists, downloads. [Open Source, GPL]
url: clip.dia.fi.upm.es/Software/Ciao/
CMU Free/Shareware Prolog
CMU's AI repository offers a collection of Prolog implementations.
url: www-2.cs.cmu.edu/afs/cs/project/ai-repository/ai/l...
EZY Prolog
A typed prolog interpreter, compatible with Visual Prolog, powrefull syntax checker with flow pattern analyser, GUI designer for declarative GUI, built-in functionality for ODBC, Winsock, regular expressions, text parsing, XML processing, HTML formatted output of Prolog source. [Free for research purposes]
url: www.ezy-software.com/ezyprolog/Prolog_Inference_En...
GNU Prolog
This compiler accepts Prolog + constraint programs and produces native binaries. The obtained executable is subsequently stand-alone. The size of this executable can be quite small since GNU Prolog can avoid linking the code of most unused built-in predicates. The performance of GNU Prolog is very encouraging (comparable to commercial systems).
url: pauillac.inria.fr/~diaz/gnu-prolog/
IC-Prolog
As part of Imperial College's Logic Programming Group Software Products, this Edinburgh-style, WAM-based version provides multiple threading, an object-oriented layer, TCP interfacing and other features.
url: www-lp.doc.ic.ac.uk/software.html
IF/Prolog
A Prolog implementation for use in industrial and commercial environments. It complies with the ISO Prolog standard and runs on UNIX and MS-Windows environments. IF/Prolog has a rich set of interfaces to standard software components and an additional Constraint Technology Package for efficient solutions of complex optimization problems. Comes with a Java interface.
url: www.ifcomputer.de/Products/Prolog/
JavaLog
Experimental Prolog interpreter in Java, mixing Logic and OO paradigms
url: www.exa.unicen.edu.ar/~azunino/javalog.html
Jinni 2000 (Java INference Engine and Networked Interactor)
A fast multi-threaded, networking and GUI enabled Prolog compiler, extensible through a Reflection based Java interface.
url: www.binnetcorp.com/Jinni/
JIP
Java Internet Prolog is a Prolog Java-compatible interpreter. JDK1.1- and Edinburgh Prolog-compliant this Prolog version allows code written in Prolog to be run in any Java applet or application and Java methods to be called in any Prolog code.
url: www.ugosweb.com/jiprolog/
jProlog
Experimental Prolog to Java compiler, running on JDK 1.0.2 and higher.
url: www.cs.kuleuven.ac.be/~bmd/PrologInJava/
K-Prolog
This is the English Online Manual for this Japanese implementation of Prolog for Solaris, HP-UX and 32-bit Windows environments.
url: Prolog.isac.co.jp/doc/en/
Logic Programming Associates
WIN-PROLOG, DOS-PROLOG, MacProlog32 compilers. Products range from Prolog++ an OOPs extension, flex an expert system toolkit, and various web based technologies. [Commercial]
url: www.lpa.co.uk/ind_pro.htm
Logtalk
An object-oriented extension to the Prolog programming language. It integrates logic programming with object-oriented and event-driven programming. Compatible with most Prolog compilers. [Open source]
url: www.logtalk.org/
MINERVA
Implementation of ISO Prolog in 100% Java. Extensible with any Java class. Callable as servlet, applet, standalone, or Java class library. Includes XML parser and generator. [Commercial]
url: www.ifcomputer.com/MINERVA/
NU-Prolog
The successor of MU-Prolog, this compiled Prolog system designed and implemented in the mid-80's as a 'purer' logic solution, interfaces with UNIFY databases and is available under an academic license.
url: www.cs.mu.oz.au/~lee/src/nuprolog/
Palm Toy Language
A toy PROLOG interpreter for Palm. First PROLOG in PalmPilot.
url: www.geocities.com/willowfung/
ProFIT
Prolog with Features Inheritance, and Templates: Prolog extension with sorted feature structures (including multi-dimensional inheritance), finite domains, feature search, cyclic terms, templates.
url: www.coli.uni-sb.de/~erbach/formal/profit/profit.ht...
Quintus Prolog
The Swedish Institute for Computer Science's implementation of Prolog for UNIX and PC platforms is embeddable, integrable and commercial-strength.
url: www.sics.se/isl/quintus/
Qu-Prolog
The Software Verification Research Centre (Univ. of Queensland) extended version of Prolog currently released under Linux and Solaris is designed primarily as a prototyping language and tactic language for theorem provers, including support for efficient higher-order programming and logic programming of interactive applications.
url: www.svrc.uq.edu.au/Software/QuPrologHome.html
Reform Prolog
Recursion-parallel Single Program, Multiple Data (SPMD) implementation; assumes one sequential worker and arbitrary, fixed number parallel workers, each worker is process, can have more workers than processors. Successor: High Performance Erlang. [Open Source, GPL]
url: user.it.uu.se/~thomasl/reform.html
SICStus Prolog 3
This ISO-conformant performance-oriented Prolog development system also features interfaces with C/C++, Java and ODBC-compliant DBMS's and an OOP extension.
url: www.sics.se/sicstus.html
Strawberry Prolog
This Prolog compiler for Windows 95/98/NT and Unix/Linux supports OLE and Prolog CGI Scripts. Strawberry Prolog is suitable for client-server applications and has unique debugging facilities.
url: www.dobrev.com/
Trinc-Prolog, an object oriented prolog for Windows
Trinc-Prolog is a new development tool for the prolog language. Trinc-Prolog supports the ISO Prolog standard and has extended the prolog language with innovative object oriented features. TPWIN,an OO class library is available to develop Windows applications.
url: www.trinc-prolog.com/
tuProlog
A Java-based light-weight Prolog for Internet applications and infrastructures, developed at DEIS - Universita' di Bologna. [Free for non-commercial use]
url: lia.deis.unibo.it/research/tuprolog/
Visual Prolog
A full-featured programming environment is offered with all the facilities necessary to write mission-critical, commercial-grade applications. A freeware version is available.
url: www.visual-prolog.com/
W-Prolog
This simple interpreter for a Prolog-like language is written in Java. Although not fast the implementation is extremely portable and can be run as an applet under Java-capable web browsers.
url: goanna.cs.rmit.edu.au/~winikoff/wp/
The YAP Prolog System
The University of Porto's Edinburgh-style, WAM-based Prolog engine is available on 32-bit machines running Sun and Linux and 64-bit Alphas running OSF UNIX and Linux. An open-source policy is being implemented with regard to distribution.
url: www.ncc.up.pt/~vsc/Yap/