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
Use simulation to perform statistical analyses.
Frevo is probably the simplest tool for evolutionary design
Biomolecular electrostatics software
Toolkit for agent-based & dynamic microsimulation modelling
Simulation and Control of Processing Plants
R/Bioconductor toolkit for mass spectrometry data
A 3D simulator game where you can drive, fly, and sail
Free multiphysics simulation software package
Unity3D DIS(1278.1) Implementation
Advanced numerical instruments: adaptive meshing, FE methods, solvers
The Project moved to github https://github.com/EnFlexIT/AgentWorkbench