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Superficially, Dominoes on Acid is a solitaire variant of Dominoes with weird colorful tiles. But on a deeper level it is a GUI for natural deduction. Every completed domino is equivalent to a proof of a tautology in classical propositional logic.
A tool for proof theorists to study deduction systems and to develop proof search strategies for them. GraPE should eventually support step-by-step proof construction, automatic proof search with various strategies, proof transformations and analysis.
Chameleon is a rule-based expert system to assist farmers in semi-arid areas to prevent bush encroachment.
It runs as a web-application on a Tomcat server with MySQL and is based on the Mandarax library for deduction rules and its front-end, Oryx.