A simple hydrodynamic code less than 700 lines long!
Simple Queue Simulator
VEX Robotics Competition Simulator
VOpR - a virtual optical rail
Stochastic Analysis
Computer science experiment manager
OpenEstragon is a market economy simulator.
collection of illustrative programs:small games, simulators: C, Matlab
Chromatography Analysis and Design Toolkit
FDTD Electomagnetic Wave Simulation Software
Solve an energy market supply/demand equilibrium problem
Agent-based framework for Artificial Life and Complex Systems