A classical propositional theorem prover in Haskell, using Wang's Algorithm.

A web-based graphical proof assistant for LK and Hoare logic.

Code for the "Logic, machines and sequent calculus" talk

Experiments with sequent calculi

Proof search for intuitionistic propositional logic using Dyckhoff's LJT.

pesca: Proof Editor for Sequent Calculus (mirror)

Pravda is a tool for teaching formal logic.

boolean expression manipulator for educational purposes

Master Thesis Project at LARA (EPFL)

형식언어 ℒ에서 Gentzen의 추론 규칙에 따른 논증 타당성 검증기

命題論理のシークエント計算の簡単な実装 (Ruby版)

Equivalence of natural deduction and sequent calculus in HOL4

Label-based Caliculi for Modal Logic

Intuitionistic and classical propositional logic library

Présentation de l'article Focalisation and Classical Realizability de Guillaume Munch-Maccagnoni.

a tiny LCF-style proof assistant.

A webapp for creating sequent proof of propositional formulas

∇⎕ coloring

Implementation of Gentzen's Sequent Calculus (LK) applied to creating and interrogating a database in natural language