Please note that this list has no longer been actively maintained after 2009.
- functions : provability of formulas in several logics, validity of formulas in a model, drawing and editing Kripke models and models for dynamic logic
- platforms : web
- developer : Lex Hendriks, ILLC, University of Amsterdam, the Netherlands
- email : A [dot] Hendriks [at] uva [dot] nl ( A [dot] Hendriks [at] uva [dot] nl )
- book : no
- comments :
- functions : natural deduction for propositional logic
- platforms : web
- developers : Björn von Sydow, Department of Computing Science, Chalmers University, Göteborg, Sweden
- email : sydow [at] cs [dot] chalmers [dot] se ( sydow [at] cs [dot] chalmers [dot] se )
- book : no
- comments : ascii interface
- functions : natural deduction for propositional and predicate logic (including adaptations to intuitionistic and minimal logic), interactive proof construction
- platforms : anything enabling Java
- developers : Wilfried Sieg and collaborators, Carnegie Mellon University, USA
- email : sieg [at] cmu [dot] edu ( sieg [at] cmu [dot] edu )
- book : no
- comments : formerly known as 'Carnegie Mellon Proof Tutor' (at that time involving Richard Scheines); website includes an online course in logic.
- functions : formalizing English sentences into symbolic logic
- platforms : Windows95/98/NT
- developers :
- email : marcow [at] cs [dot] utexas [dot] edu ( marcow [at] cs [dot] utexas [dot] edu )
- book :
- comments :
- functions : hierarchically structuring arguments and their support, in a graphical interface using a tree format; similar tools for negotation
- platforms : Windows
- developers : Bertil Rolf, Blekinge Institute of Technology, Sweden, and others
- email : info [at] athenasoft [dot] org ( info [at] athenasoft [dot] org ), bertil [dot] rolf [at] bth [dot] se ( bertil [dot] rolf [at] bth [dot] se )
- book : various online documentation, powerpoint, etc.
- comments : also for use on highschools, teacher support, added to list in 2003
- functions : natural deduction in propositional and predicate logic
- platforms : Windows
- developer : Austen Clark, University of Connecticut USA
- email : austen [dot] clark [at] uconn [dot] edu ( austen [dot] clark [at] uconn [dot] edu )
- book : Merrie Bergmann, Jim Moor, and Jack Nelson, The Logic Book , 2nd edition. McGrawHill 1992.
- comments : available as GNU Public Domain License software
- functions : tableau-like validity testing of predicate logic formulas
- platforms : Apple
- developers : Larry A. Herzberg, University of Wisconsin - Oshkosh, USA
- email : herzberg [at] uwosh [dot] edu ( herzberg [at] uwosh [dot] edu )
- book : no
- comments :
- functions : semantic tableaux for propositional and predicate logics
- platforms : web (requires downloading 'Shockwave'), Mac, Windows
- developers : Corin Howitt, Oxford University, UK
- email : corin [dot] howitt [at] philosophy [dot] ox [dot] ac [dot] uk ( corin [dot] howitt [at] philosophy [dot] ox [dot] ac [dot] uk )
- book : no (particularly suitable for use with either Jeffrey or Hodges)
- comments : online proof demonstrations; save/load to web servers; interactive tutorials; modal logic version to be released later; added to list in 2003
- functions : Boolean search, logic circuits, truth-tables, semantics of modal logic with possible-worlds diagrams, quantification.
- platforms : web
- developers : David Velleman, New York University, USA
- email : jdvelleman [at] nyu [dot] edu ( jdvelleman [at] nyu [dot] edu )
- book : this is an interactive textbook
- comments :
- functions : truth tables
- platforms : Windows, Mac OSX and Classic MacOS
- developers : John Etchemendy, Stanford University, USA, Jon Barwise, Indiana University USA
- email : Dave Barker-Plummer, dbp-at-csli-dot-stanford-dot-edu , or User Support, LPLbugs-at-csli-dot-stanford-dot-edu
- book : John Etchemendy & Jon Barwise, Language, Proof and Logic . CSLI Publications, 2000.
- comments : The book comes with the software: Fitch, Boole, and Tarski's World.
- functions : truthtables and natural deduction for propositional logic
- platforms : web
- developers : Jonne Zutt and Joost Broekens, Delft University, the Netherlands
- email : j [dot] zutt [at] ewi [dot] tudelft [dot] nl ( j [dot] zutt [at] ewi [dot] tudelft [dot] nl ) or Hans Tonino: J [dot] F [dot] M [dot] Tonino [at] ewi [dot] tudelft [dot] nl ( J [dot] F [dot] M [dot] Tonino [at] ewi [dot] tudelft [dot] nl )
- book : no
- comments :
- functions : Aristotelian (syllogistic) logic
- platforms : web
- developers : Klaus Glashoff, Germany
- email : logic [at] glashoff [dot] net ( logic [at] glashoff [dot] net ),
- book : no
- comments :
- functions : natural deduction, formal arguments
- platforms : Windows
- developers : Dan Christensen
- email : dc [at] dcproof [dot] com ( dc [at] dcproof [dot] com )
- book : no
- comments :
- functions : natural deduction for propositional and predicate logic, interactive proof construction, tableaux, elementary semantics, symbolization, modal logic
- platforms : Java applet (for web pages) or Java web start application
- developers : Martin Fricke
- email : mfricke [at] softoption [dot] us ( mfricke [at] softoption [dot] us )
- book : no
- comments : a remarkable collection of diverse online tutorials with accompanying applets, and adjusted to various standard notations and (philosophical) logics
- functions : semantic (interpreted) evaluation of propositional and predicate logic formulas
- platforms : web
- developers : John Halleck, University of Utah, USA
- email : John [dot] Halleck [at] utah [dot] edu ( John [dot] Halleck [at] utah [dot] edu )
- book : no
- comments : links to other web resources (modal logics)
- functions : natural deduction for predicate logic
- platforms : Windows, Mac OSX and Classic MacOS
- developers : John Etchemendy, Stanford University USA, Jon Barwise, Indiana University USA
- email : Dave Barker-Plummer, dbp-at-csli-dot-stanford-dot-edu , or User Support, LPLbugs-at-csli-dot-stanford-dot-edu
- book : John Etchemendy & Jon Barwise, Language, Proof and Logic . CSLI Publications, 2000.
- comments : The book comes with the software: Fitch, Boole, and Tarski's World.
- functions : natural deduction for predicate logic (Lemmon- and Fitch-style), truth tables, ...
- platforms : web
- developers : Christian Gottschall (University of Vienna, Austria)
- email : gottschall [at] gmx [dot] de ( gottschall [at] gmx [dot] de )
- book : no
- comments : both in English and German
- functions : public updates in epistemic logic
- platforms : web
- developers : Jan Jaspars, Free-lance logician & University of Amsterdam, the Netherlands
- email : jaspars [at] science [dot] uva [dot] nl ( jaspars [at] science [dot] uva [dot] nl )
- book : no
- comments : in Dutch (courseware additional to University of Amsterdam lectures)
- functions : natural deduction for predicate logic, visual reasoning
- platforms : Apple
- developers : John Etchemendy, Stanford University USA, Jon Barwise, Indiana University USA
- email: dbp-at-csli-dot-stanford-dot-edu (Dave Barker-Plummer)
- book : Hyperproof , John Etchemendy and Jon Barwise, CSLI publications, 1994
- comments : Hyperproof is currently out of print
- functions :
- platforms : Mac, Windows
- developers : Stuart Glennan
- email : sglennan [at] butler [dot] edu ( sglennan [at] butler [dot] edu )
- book : Joseph Bessie and Stuart Glennan, Elements of Deductive Inference , Wadsworth 2000
- comments :
- functions : truthtables in propositional logic, unification of terms
- platforms : web
- developers : Stanley N. Burris, University of Waterloo, Canada
- email : snburris [at] thoralf [dot] uwaterloo [dot] ca ( snburris [at] thoralf [dot] uwaterloo [dot] ca )
- book : Logic for Mathematics and Computer Science , Prentice Hall 1998.
- comments : added to list in 2003
- functions : natural deduction and sequent proof in classical predicate logic; plus various other logics and formal systems; plus user-defined logics
- platforms : MacOSX, Windows, Linux, Solaris
- developers : Bernard Sufrin, Oxford University UK & Richard Bornat, QMW London UK
- email : Bernard [dot] Sufrin [at] comlab [dot] ox [dot] ac [dot] uk ( Bernard [dot] Sufrin [at] comlab [dot] ox [dot] ac [dot] uk ), richard [at] dcs [dot] qmw [dot] ac [dot] uk ( richard [at] dcs [dot] qmw [dot] ac [dot] uk )
- book : coming
- comments : Jape is acronym for 'just another proof editor'
- functions : MC questions and answers about various logical topics, including modal
- platforms : web
- developers : Michael Huth and Marc Ryan, School of Computer Science, University of Birmingham, UK
- email : M [dot] Huth [at] doc [dot] ic [dot] ac [dot] uk ( M [dot] Huth [at] doc [dot] ic [dot] ac [dot] uk ), M [dot] D [dot] Ryan [at] cs [dot] bham [dot] ac [dot] uk ( M [dot] D [dot] Ryan [at] cs [dot] bham [dot] ac [dot] uk )
- book : Logic in Computer Science , Cambridge University Press, 2000.
- comments :
- functions : semantic computations in propositional, predicate, dynamic, modal logic
- platforms : web
- developers : Jan Jaspars, Free-lance logician & University of Amsterdam, the Netherlands
- email : jaspars [at] science [dot] uva [dot] nl ( jaspars [at] science [dot] uva [dot] nl )
- book : no
- comments : mainly in Dutch
- functions : truthtables, predicate logic arguments, MC questions
- platforms : web (Linux, Mac public domain versions)
- developers : John Halpin, Oakland University
- email : halpin [at] oakland [dot] edu ( halpin [at] oakland [dot] edu )
- book : online
- comments : online logic textbook with integrated web-based exercises, public domain
- functions : natural deduction for predicate logic, truth tables for propositional logic, countermodels for predicate logic.
- platforms : web
- developers : Colin Allen, http://mypage.iu.edu/~colallen/ and Chris Menzel, Texas A&M University, http://philebus.tamu.edu/cmenzel/
- email : colallen@indiana.edu
- book : Colin Allen and Michael Hand, Logic Primer (2nd ed.). MIT Press 2001.
- comments : ascii interface; integrated, context sensitive help system; with multiple choice exercises
Logic for Fun , http://logic4fun.rsise.anu.edu.au/
- functions : expressing puzzles and other problems in first order logic
- platforms : web
- developer : John Slaney, Australian National University
- email : John [dot] Slaney [at] anu [dot] edu [dot] au ( John [dot] Slaney [at] anu [dot] edu [dot] au )
- book : no
- comments :
- functions : syllogisms, truthtables, natural deduction for propositional logic
- platforms : web, windows
- developers : John Saetti
- email : john [dot] saetti [at] gcccd [dot] net ( john [dot] saetti [at] gcccd [dot] net )
- book : no
- comments :
- functions : truthtables, syllogisms, proofs, informal logic, ...
- platforms : Windows, Apple
- developers : Nelson Pole, Cleveland State University, Ohio, USA
- email : n [dot] pole [at] csuohio [dot] edu ( n [dot] pole [at] csuohio [dot] edu )
- book : Patrick Hurley, A Concise Introduction to Logic , 8th edition, Wadsworth 2003.
Howard Kahane & Paul Tidman, Logic and Philosophy : A Modern Introduction , 9th edition, Wadsworth 2003. Dale Jacquette, Symbolic Logic , Wadsworth 2001.
- comments : instructor's package available; (updated 2003)
- functions : proof and computation in propositional logics (minimal, intuitionist, classical, modal, nonmonotonic, ...)
- platforms : web, Apple, Linux, Solaris
- developers : Gerhard Jäger (project leader), Peter Balsiger, Alain Heuerding, Stefan Schwendimann, University of Bern, Switzerland
- email : lwb [at] iam [dot] unibe [dot] ch ( lwb [at] iam [dot] unibe [dot] ch )
- book : extensive online manual
- comments : no proof editing
- functions : predicate logic (minimal, intuitionistic, classical), natural deduction and sequent calculus
- platforms : Apple
- developers : Roy Dyckhoff, St Andrews University, Scotland UK
- email : rd [at] dcs [dot] st-andrews [dot] ac [dot] uk ( rd [at] dcs [dot] st-andrews [dot] ac [dot] uk )
- book : optional: G. Forbes, Modern Logic , Oxford University Press, 1993
- comments : MacLogic is no longer updated to current versions of MacOS; however, to run MacLogic under emulation on Apple OSX and other than Apple platforms, see http://fitelson.org/maclogic.htm
- functions : natural deduction for predicate logic
- platforms : web
- developers : Krysia Broda and others, Department of Computing, Imperial College, London, UK
- email : kb [at] doc [dot] ic [dot] ac [dot] uk ( kb [at] doc [dot] ic [dot] ac [dot] uk )
- book : S. Eisenbach et al, Reasoned Programming , Prentice Hall, 1994.
See also Ian Hodkinson's coursenotes
- comments : based on earlier version called 'Pandora'
- functions : propositional logic, predicate logic, syllogistic reasoning support
- platforms : web; designed for the Internet Explorer
- developers : Ludmila Dostalova and Jaroslav Lang, University of West Bohemia in Pilsen, Czech Republic
- email : ldostal [at] kfi [dot] zcu [dot] cz ( ldostal [at] kfi [dot] zcu [dot] cz )
- book : no
- comments : pilot version with a limited number of functions and a raw user interface; in czech language.
- functions : interactive proof editor, natural deduction
- platforms : web
- developers : Masaru Shirahata, Keio University, Japan
- email : sirahata [at] math [dot] hc [dot] keio [dot] ac [dot] jp ( sirahata [at] math [dot] hc [dot] keio [dot] ac [dot] jp )
- book :
- comments : see also: Virtual Math homepage
- functions : proofs in propositional and predicate calculus
- platforms : Windows, Mac
- developers :
- email : marcow [at] cs [dot] utexas [dot] edu ( marcow [at] cs [dot] utexas [dot] edu ), Robert C. Koons: rkoons [at] mail [dot] utexas [dot] edu ( rkoons [at] mail [dot] utexas [dot] edu )
- book : Robert C. Koons, A Logical Toolbox, 2000.
- comments :
- functions : various logical topics, proof checking
- platforms : web
- developers : Colin Allen, http://mypage.iu.edu/~colallen/ and Chris Menzel http://philebus.tamu.edu/cmenzel/
- email : webmaster [at] poweroflogic [dot] com ( webmaster [at] poweroflogic [dot] com )
- book : C. Stephen Layman, The Power of Logic (3rd ed.), McGraw Hill.
- comments :
- functions : sequent-style natural deduction for predicate logic, computation of normal forms
- platforms : Windows
- developers : Patrice Bailhache, University of Nantes, France
- email : not known
- book : no
- comments : used by Nantes (France) philosophy students
- functions : natural deduction, resolution, equational reasoning, etc.
- platforms : anything enabling Java (Windows, LINUX, Apple, UNIX, ...)
- developers : Hugh McGuire, Grand Valley State University, Michigan, USA
- email : mcguire [at] cis [dot] gvsu [dot] edu ( mcguire [at] cis [dot] gvsu [dot] edu )
- book : no
- comments : ProofBuilder adapts to the notation that you use, and you can copy/paste from HTML, PDF, MS Word, etc.
- functions : natural deduction for propositional and predicate logic
- platforms : web
- developers : main developer of the system was Cezary Kaliszyk, after ideas by Freek Wiedijk
- email : proofweb [at] cs [dot] ru [dot] nl ( proofweb [at] cs [dot] ru [dot] nl )
- book : Huth & Ryan, Logic in Computer Science, CUP
- comments : almost, but not quite, entirely unlike the Jape system
- functions : visually representing arguments
- platforms : Windows 95 and up
- developers : Tim van Gelder, University of Melbourne, Australia
- email : info [at] goreason [dot] com ( info [at] goreason [dot] com )
- book : no
- comments : teachers' resources
- functions : semantic tableaux
- platforms : Windows
- developers :
- email : marcow [at] cs [dot] utexas [dot] edu ( marcow [at] cs [dot] utexas [dot] edu ), Robert C. Koons: rkoons [at] mail [dot] utexas [dot] edu ( rkoons [at] mail [dot] utexas [dot] edu )
- book : Robert C. Koons, A Logical Toolbox, 2000.
- comments :
- functions : semantic tableaux for predicate logic
- platforms : web, Windows
- developers : (Tableau II) Luciano Floridi, University of Oxford, UK; (Tableau III) Nik Roberts
- email : logic [at] philosophy [dot] ox [dot] ac [dot] uk ( logic [at] philosophy [dot] ox [dot] ac [dot] uk )
- book : site contains online tutorials. The material is compatible with: W. Hodges, Logic, 2nd edition (Penguin, 2001).
- comments : Tableau III is the successor to Tableau II, originally developed in 1988.
- functions : interpreted semantics of predicate logic
- platforms : Windows, Apple
- developers : John Etchemendy, Stanford University USA, Jon Barwise, Indiana University USA
- email : dbp-at-csli-dot-stanford-dot-edu (Dave Barker-Plummer)
- book : The Language of First-order Logic (3rd edition), John Etchemendy and Jon Barwise, CSLI publications, 1994 (Also: Tarski "Lite", same authors; also: Language, Proof and Logic, same authors)
- comments : includes the Hintikka game (semantic tableaux)
- functions : interactive proof of theorems of first-order logic or higher-order logic (type theory)
- platforms : Unix, Windows, web
- developers : Peter B. Andrews, Carnegie Mellon University; and others
- email : andrews [at] cmu [dot] edu ( andrews [at] cmu [dot] edu )
- book : Peter B. Andrews, An Introduction to Mathematical Logic and Type Theory: To Truth Through Proof, Second Edition, Kluwer Academic Publishers, 2002
- comments : see also "ETPS: A System to Help Students Write Formal Proofs" at http://gtps.math.cmu.edu/tps-papers.html ; added to list in 2003
- functions : semantic tableaux generator for propositional and predicate logic
- platforms : web
- developers : Wolfgang Schwarz
- email : wo [at] umsu [dot] de ( wo [at] umsu [dot] de )
- book : no
- comments : no interactive proof construction
- functions : computing truth (trees) in propositional and predicate logic
- platforms : Dos, Windows
- developer : Austen Clark, University of Connecticut USA
- email : austen [dot] clark [at] uconn [dot] edu ( austen [dot] clark [at] uconn [dot] edu )
- books : Merrie Bergmann, Jim Moor, and Jack Nelson, The Logic Book , 2nd edition. McGrawHill 1992.
Richard Jeffrey, Formal Logic: Its Scope and Limits , 3rd edition. McGraw-Hill 1991.
- comments : available as GNU Public Domain License software