EKB just spotted this browsing SourceForge:
Where: http://ecolab.sourceforge.net/ http://sourceforge.net/projects/ecolab Description: "EcoLab is both the name of a software package and a research project that is looking at the dynamics of evolution. EcoLab the software package is now a fairly complete agent-based simulation system." (From web site) Updated: Dec 2006 Contact: See web site
From the description:
arjen - 2021-10-12 06:33:15
AM I recently found this article about the package. It stresses the use of Tcl and Tk to control the simulations. (One strange thing: arXiv shows it as dating from january 2004, but the PDF has a date october 2018. I'd say this proves that was still maintained and developed until at least a few years ago)