ACL2 Version
2.7

A programming language in which you can model computer systems and a
tool to help prove properties of those models. Available under GPL and runs on
various platforms. Includes related download
links.

http://www.cs.utexas.edu/users/moore/acl2/

Automated Reasoning
Project

Web resource provided by research group. Includes access to
software developed by the team, coverering such projects as FINDER (Finite
Domain Enumerator), MaGIC (Matrix Generator for Implication Connectives) and
Kripke (A theorem prover for the relevant logic
LR).

http://cslab.anu.edu.au/ar/

Bertrand

First-order
satisfiability checker and prover for the
Macintosh.

http://www.humnet.ucla.edu/humnet/phil/grads/herzberg/Bertrand.html

Church

Program
understands the different types of lambda expressions, can extract lists of
variables (both free and bound) and subterms, and can simplify complicated
expressions. Uses Python.

http://www.alcyone.com/software/church/

Database of Existing
Mechanized Reasoning Systems

A list (>50 entries) of automatic
resolution provers (like Otter), interactive provers (like PVS) and other
mechanized reasoning
tools.

http://www-formal.stanford.edu/clt/ARS/systems.html

DC Proof
Online

New proof-writing software to teach the fundamentals of logic and
proof. Enables users/students to write error-free proofs by selecting rules of
inference, axioms, etc. from convenient drop-down menus. Includes tutorial and
exercises.

http://www.dcproof.com

DELORES

A
forward-chaining reasoning engine for defeasible logic, a less expressive but
more efficient nonmonotonic
logic.

http://www.dfki.uni-kl.de/~miller/delores/

Gateway to
Logic

A collection of web-based logic programs offering a number of
logical functions: interactively or automatically build proofs, check theorems,
and operate on propositional logic
formulae.

http://logik.phl.univie.ac.at/~chris/formular-uk.html

Isabelle

A
generic theorem proving environment developed at Cambridge University (Larry
Paulson) and TU Munich (Tobias Nipkow). Includes logic, documentation and free
download.

http://www.cl.cam.ac.uk/Research/HVG/Isabelle/

llprover

A
linear logic prover that searches a cut-free proof for the given two-sided
sequent of first-order linear
logic.

http://bach.scitec.kobe-u.ac.jp/llprover/

Logic Software from
CSLI

By Jon Barwise and John
Etchemendy.

http://www-csli.stanford.edu/hp/Logic-software.html

LOOM

A language
and environment for constructing intelligent applications. It is a research
project in the Artificial Intelligence research group at the University of
Southern California's Information Sciences Institute. The goal of the project is
to develop and field advanced tools for knowledge representation and reasoning
in Artificial Intelligence.

http://www.isi.edu/isd/LOOM/LOOM-HOME.html

Ludwig

Application that draws
truth-tables for propositional logic formulae. Available for free download and
web use.

http://www.mintlogic.com/ludwig/

LWB

Logics
Workbench.

http://www.lwb.unibe.ch/

MUltlog

Takes
as input the specification of a finitely-valued first-order logic and produces a
sequent calculus, a natural deduction system, and clause formation rules for
this logic.

http://www.logic.at/multlog/

MUltseq

A
generic sequent prover for propositional finitely-valued
logics.

http://www.logic.at/multseq/

Paradox

A tool
that processes first-order logic problems and tries to find finite-domain models
for them; written by Koen Claessen and Niklas SÃ¶rensson. Haskell and C++; free
download under GPL.

http://www.cs.chalmers.se/~koen/paradox/

Proof
General

Comprehensive Gnu-Emacs and XEmacs interface for several theorem
provers including Coq, Isabelle, Lego, and
Phox.

http://proofgeneral.inf.ed.ac.uk

ProofPower

A
suite of tools supporting specification and proof in Higher Order Logic (HOL)
and in Z notation.

http://www.lemma-one.com/ProofPower/index/

PROTEIN

A
PROver with a Theory Extension INterface. Theorem prover for first-order clause
logic, written in ECRC's Prolog-dialect ECLiPSe. Free download,
documentation.

http://www.uni-koblenz.de/ag-ki/Implementierungen/Protein/

PVS

The PVS
Specification and Verification System. Available for Sparc machines with Solaris
2 and Intel x86 Machines with Linux compatible with Redhat 5 or later. Required
is Emacs (version 19 or later), recommended LaTeX and Tcl/Tk. Download by
FTP.

http://pvs.csl.sri.com/

SwitchMin Digital
Circuit Minimizer

Tool for minimizing boolean logic
functions.

http://incolor.inetnebr.com/double/softlib/switchmin.html

The Coq
Project

Deals with effectively machine-checked formal mathematics. In
practice, this includes the study of mathematical formalisms well-suited for
implementations, the implementations themselves and the use of these for various
applications. Focuses on software correctness
proofs.

http://pauillac.inria.fr/coq/

Tree Proof
Generator

An implementation of the semantic tableaux method for classical
propositional and predicate logic, written in
JavaScript/DOM.

http://www.umsu.de/logik/trees

VeriFun

A
semi-automated system for the verification of statements about programs written
in a functional programming language. The system is capable of following
fully-automated routines for theorem proving and hypotheses formation, as well
as operating interactively when these reoutines
fail.

http://www.informatik.tu-darmstadt.de/pm/verifun/

Visual Turing

A
graphical IDE for creating, running and debugging Turing machines. Freeware for
Windows 95/98/NT/2000.

http://www.cheransoft.com/vturing/

WinKE: A Proof
Assistant for Teaching Logic

WinKE is an interactive proof assistant
based on analytic tableaux, and designed for the teaching of deductive
reasoning. Ordering information is available at this site, as are academic
papers on the design of the
software.

http://www.dcs.kcl.ac.uk/staff/endriss/WinKE/

Last updated on: 2004-11-21 22:27:36