Galacticus, a semi-analytic model of galaxy formation that solves the equations governing the formation and evolution of galaxies within a hierarchically assembling network of dark matter halos, as it occurs in cold dark matter dominated universes, is now at version 0.9.1.
Galacticus 0.9.1 is the result of one year of continuous development, and even if it doesn't look like a final version, it actually is stable and will only receive bug fixes.
Highlights of Galacticus 0.9.1:
• Several new "simplified" implementations of galaxy physics have been added;
• New algorithms have been added to solve the Press-Schechter excursion set problem;
• The reionization epoch (used to cut off accretion into low mass halos) can now be specified via the optical depth;
• Merger trees constructed within Galacticus can now be exported into either Galacticus' native file format.
For more information about the project, check out the official announcement
Download Galacticus 0.9.1
right now from Softpedia.