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cabasaA generic 2D cellular automaton simulator
HAIL-CAESARThe High-Performance Architecture-Independent LISFLOOD-CAESAR model of floodplain, river, and sediment dynamics
nutshell[alpha!] [on hiatus] An advanced cellular-automaton-specification language that transpiles to Golly's.
WireworldA simple Wireworld cellular automaton explorer in Swift
cellularA simple command-line tool that generates gif images and animations from elementary cellular automata