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...This was originally an extended re-implementation of the "front-end" part in the following paper:
https://www.computer.org/csdl/proceedings/reconfig/2008/3474/00/3474a073-abs.html
It has since grown to include conversion of a set of NFAs to a DFA; compilation of NFAs to instruction suitable for simulation; and compilation of a DFA to hash-based data structures for a simulator.
visualFSA is a small tool which lets you construct NFAs/DFAs [(non)deterministic finite automata]. It offers some common algorithms which can be applied to that automatons, like converting NFA -> DFA, word problem, accepted language etc.
A C library, providing comfortable APIs for a wide range of Finite State Abstract Machines (NFA, DFA, FST, Bimachines, etc). Implements most of the classical algorithms in the field.