Golly is an open source, cross-platform application for exploring Conway's Game of Life and many other types of cellular automata.
Supports bounded and unbounded universes, with cells of up to 256 states.
Supports multiple algorithms, including Bill Gosper's super fast hashlife algorithm.
Many different types of CA are included: John von Neumann's 29-state CA, Wolfram's 1D rules, WireWorld, Generations, Langton's Loops, Paterson's Worms, etc.
Reads RLE, macrocell, Life 1.05/1.06, dblife, and MCell files.
Can extract patterns and rules from zip files.
Can download patterns and rules from online archives.
Includes a state-of-the-art pattern collection.
Extensive help, with an integrated Life Lexicon.