Logicheck
An interactive tool to test logical structures and expressions
This program is intended to be useful for testing Boolean logic or propositional logic. It sets out logical expressions with symbols such as "AND" and "OR" in a graphical user interface. A truth table can then be generated for any such set of expressions. It can also be used to test the validity of deductive arguments - the program will advise whether an argument is valid and if not, list the counter examples to the argument.