SUMO is a microscopic, multi-modal traffic simulation.
A library for scientific data visualization
Population Propogation in Python. Simulate births, marriages, deaths
phase-field simulation and other examples with Python/FEniCS
Acoustic Simulation Library for Frequency and Time Domain Simulations.
Simulate high power rocket flights with splash down plots
Robot simulator inspired by Sim.I.Am
Power flow library in C++
Chemical Engineering process simulations program
... [BATCH], [ANALYZE] and [OPTIMIZE] cases in OpenFOAM and others
Networked training tool for Air Traffic Controllers