FlightGear Flight Simulator: free open-source multiplatform flight sim
System dynamics program with additional features for economics
physics-based multicellular simulator
Agent-based simulation toolkit
PySCeS Constraint Based Modelling
A multi-modeling and simulation environment to study complex systems
Acoustic Simulation Library for Frequency and Time Domain Simulations.
Managing Ongoing RElationships for Agent-Based Modelling
The Repast Suite is a family of free agent-based modeling libraries.
EXperimental REplicator COllider
The Project moved to github https://github.com/EnFlexIT/AgentWorkbench
A Library for Interactive Modelling and Visualisation
Agent-based framework for Artificial Life and Complex Systems
Lightweight Architecture for boundedly Rational Agents
approximate Bayesian computation for stochastic differential equations