SUMO is a microscopic, multi-modal traffic simulation.
Component, CA, and CCA models; superdense time, DB repo, testing, etc.
A simulator for drones, cars and more, built on Unreal Engine
The Repast Suite is a family of free agent-based modeling libraries.
Modeling and Simulation made NiCE!
Plugin orientated Discrete Dipole Approximation (DDA) Solver
Eclipse plugin for Stochastic Pi Machine
Examples for the aXBench.