3TAP
Many-valued tableau-based theorem prover developed at the University of Karlsruhe. It can be instantiated for arbitrary finitely-valued first-order logics, and it can handle equality (two-valued), sorts, and non-clausal input. |
Bertrand
First-order satisfiability checker and prover for the Macintosh. |
Church
Program understands the different types of lambda expressions, can extract lists of variables (both free and bound) and subterms, and can simplify complicated by expression by means of application. Uses Python. |
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. |
Excel Logic Tool
Free Excel logic processor add-in for symbolic logic and mathematics. |
Isabelle
"The" Isabelle theorem proving environment. |
Logic Software from CSLI
By Jon Barwise and John Etchemendy. |
LWB
Logics Workbench. |
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. |
MUltseq
A generic sequent prover for propositional finitely-valued logics. |
ProofGeneral
Comprehensive Gnu-Emacs and XEmacs interface for several theorem provers (currently, Coq, Isabelle, Lego, and Phox). |
ProofPower
A suite of tools supporting specification and proof in Higher Order Logic (HOL) and in Z notation. |
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. |
SAT Hard Instance Generator and Solution Algorithms
Utilities and algorithms by V. Z. Nuri. |
SwitchMin Digital Circuit Minimizer
Tool for minimizing boolean logic functions. |
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 |
The ILF System
A Tool for the Integration of Logical Functions. ILF is a shell that facilitates the work with a variety of theorem provers. Currently, it has interfaces with the automated provers Discount, Protein, Setheo and Spass. |
The leanTAP Home Page
Lean, Tableau-based Deduction (theorem prover for first order logic). |
Theorem Provers
A list of (well-known) theorem provers on logic-server at the university of Muenchen. Good point to start. |
Visual Turing
A graphical IDE that used to edit and play with Turing machines. Windows 95/98/NT/2000. Free to download, pay for source kit. |
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. |
