SUMO is a microscopic, multi-modal traffic simulation.
Queueing Theory Algorithms
FEATool Multiphysics is an easy-to-use FEA and CFD Simulation Toolbox
Solves symbolic electrical AC circuit equations
Class library for computational cybernetics
Open source software calculating industrial noise in the environment
ASALI is an open-source code for chemical engineers
Use simulation to perform statistical analyses.
Graphical User Interface for Gromacs
Random phenomena generator
Frevo is probably the simplest tool for evolutionary design
This is the liquid rocket engine parameter solver Alpha release 1.
Gradually Varied Flow (GVF) simulation.
Biomolecular electrostatics software
Toolkit for agent-based & dynamic microsimulation modelling
Simulation and Control of Processing Plants
Dynamic Linkage Social Aggregation Model
R/Bioconductor toolkit for mass spectrometry data
A 3D simulator game where you can drive, fly, and sail
Free multiphysics simulation software package