Model-rocketry aerodynamics and trajectory simulation software
The Open Source CFD Toolbox
Industry standard communication with compliant image generators.
DIS(IEEE 1278.1) Fully Implemented in C++
PySCeS is the Python Simulator of Cellular Systems
The Repast Suite is a family of free agent-based modeling libraries.
A highly flexible 3D flocking boids simulator, conceived as a tool for
Advanced numerical instruments: adaptive meshing, FE methods, solvers
A Turing Machine Simulator
Common accessible environment for system dynamics simulation.
collection of illustrative programs:small games, simulators: C, Matlab