ULM (Unified Life Models, Legendre & Clobert 1995, Ferrière & al. 1996) is an open-source software enabling the simulation and analysis of deterministic and stochastic discrete time dynamical systems for population dynamics modeling. ULM works natively on Windows, Linux and macOS. If some of you are interested in developing scientific applications with Pascal, there are more projects from the same researchers to be ported from Delphi to Lazarus: see here, here and here.
French
ULM ou Modèles unifiés de vie est un logiciel open source permettant la simulation et l’analyse d’un système scholastique et déterminé de modelage de population dynamique. Pour Windows, Linux et macOS.