FlightGear Flight Simulator: free open-source multiplatform flight sim
System dynamics program with additional features for economics
Object-oriented equation-based modelling and optimisation software
physics-based multicellular simulator
Agent-based simulation toolkit
A multi-modeling and simulation environment to study complex systems
Multiagent simulator of road traffic in Qt/C++ and OpenStreetMap.
Acoustic Simulation Library for Frequency and Time Domain Simulations.
solves nonlinear Kohn-Sham equation for the neutral atom.
The Repast Suite is a family of free agent-based modeling libraries.
A Library for Interactive Modelling and Visualisation
Agent-based framework for Artificial Life and Complex Systems
Visu@lGrid - IDE for Building BOINC Projects
A platform for modelling influenza-like epidemics and containment