SUMO is a microscopic, multi-modal traffic simulation.
Random phenomena generator
FEATool Multiphysics is an easy-to-use FEA and CFD Simulation Toolbox
Time-dependent simulation of open and closed quantum systems
Open-Source Multiphysics FEA (FEM) Package
A co-simulation master for Functional Mockup Units (FMI 1.0 and 2.0).
Free Hydraulic Model for Water Systems
An open source controller for Scalextric community
The Vienna Topography Simulator
A finite volume groundwater simulator
Physics Game like "The Incredible Machine"
Software for data analysis, image processing, simulations, solver.
Stochastic Analysis