Gandalf (theorem prover): Automated Theorem Prover, Semantic Web, Scheme (programming language)

Vampire (Theorem Prover): Automated Theorem Proving, First Order Logic, Classical Victoria University of Manchester

E Equational Theorem Prover: Automated Proving, First Order Logic, Superposition Calculus

Skolem Normal Form: Existential Quantification, Automated Theorem Prover, Formula, First order Logic, Thoralf

Rippling: Heuristics, University of Edinburgh, Mathematical Induction, Automated Theorem Prover, Alan Bundy, Proofs