Evolve 4.0
Encyclopedia
Evolve 4.0 is an open source, freeware Artificial life
Artificial life
Artificial life is a field of study and an associated art form which examine systems related to life, its processes, and its evolution through simulations using computer models, robotics, and biochemistry. The discipline was named by Christopher Langton, an American computer scientist, in 1986...

 simulator by Ken Stauffer. In its simulated 2D cellular automata, each cell can behave independently as unicellular organism or potentially as cells in a multicellular Digital organisms, growing, moving, eating, reproducing, and eventually even evolving over time.

Each cell runs its own program written in a custom programming language
Programming language
A programming language is an artificial language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to create programs that control the behavior of a machine and/or to express algorithms precisely....

 called KFORTH (portmanteau of "Ken's Forth"), based on the Forth programming language.

Stauffer used the Evolve 4.0 environment in his "One Year of ALife" project, with the goal of running a simulation for an entire year. He has finished the project ending on day 298.

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