An open source re-implementation of Chris Sawyer's Locomotion
A Control Systems Toolbox for Julia
An implementation of a quantum simulator that you can run locally
An advanced network simulator to design and configure virtual networks
A cross-platform statistical package for econometric analysis
General Mission Analysis Tool
FlightGear Flight Simulator: free open-source multiplatform flight sim
SUMO is a microscopic, multi-modal traffic simulation.
Industry standard communication with compliant image generators.
A library for scientific data visualization
EPRI Distribution System Simulator
Program for the analysis of spectroscopic data, in particular EPR(ESR)
Graphical User Interface for Gromacs
Data manipulation and plotting program with scripting
Population Propogation in Python. Simulate births, marriages, deaths
Data Compression Simulator for E-Learning:
Object-oriented equation-based modelling and optimisation software
Frevo is probably the simplest tool for evolutionary design
Modular System for Shelves and Coasts
Tool for evaluating an energy sharing project in Wallonia.
Discrete-event simulation modeling software for science and education