  The article presents some aspects concerning the construction of a new thorn
for the Cactus code, a complete 3-dimensional machinery for numerical
relativity. This thorn is completely dedicated to numerical simulations in
cosmology, that means it can provide evolutions of different cosmological
models, mainly based on Friedman-Robertson-Walker metric. Some numerical
results are presented, testing the convergence, stability and the applicability
of the code.
