FlightGear Flight Simulator: free open-source multiplatform flight sim
General Mission Analysis Tool
DIS(IEEE 1278.1) Fully Implemented in C++
PySCeS is the Python Simulator of Cellular Systems
A multi-modeling and simulation environment to study complex systems
An Agent-Based Simulation of Invasive Pest Insects
Growing suite of proteomics simulations for educational purposes
GMES is a free Python package for FDTD electromagnetic simulations.
Simulation, analysis, and management of the movement of water
SaaS for running simulation models in the cloud
Stochastic parameter sensitivity analysis for chemical networks
CUDA accelerated spherical model forward solution for EEG/MEG