There are 3 repositories under artificial-life-simulations topic.
An experiment in artificial life, artificial neural nets, artificial sentience, simulated evolution, simulated consciousness, and genetic programming
Experiment with starting parameters of an artificial world and see how they influence development of its inhabitants and the stability of the system.
Toy that simulates reproduction and natural selection of artificial trees in a two-dimensional environment
Easy-to-use C++ library for the live tracking of lineage and coalescence trees in individual-based forward-in-time simulations.
Cellolution - a simulated evolution of artificial cells in a water world: visible within the "ocean".
Boids (short for bird-oids) is an artificial life simulation created in 1986 by Craig Reynolds.
A simple python pygame simulation to simulate Boids. Boids is an artificial life program.