FlightGear Flight Simulator: free open-source multiplatform flight sim
The A32NX & A380X Project are community driven open source projects
An implementation of a quantum simulator that you can run locally
Simulate chemical processes using advanced thermodynamic models
An advanced network simulator to design and configure virtual networks
Ab initio simulator for thermal transport and lattice anharmonicity
Circuit simulator for power electronics
A simulator for drones, cars and more, built on Unreal Engine
PySCeS is the Python Simulator of Cellular Systems
Modbus slave simulator
Small factory simulator for control logic test purpose
A tool able to simulate gene-environment and gene-gene interactions.
YASimCommander is a platform-independent editor for YASIM files.
Robot simulator inspired by Sim.I.Am
Multiscale Neuroscience and Systems Biology Simulator
TCAD Device Simulator
action/combat flight sim
BlueSky Open Air Traffic sim, (Windows/Linux/Mac, Python 2.x based)
SAPS - symulator protokołu rutowania AOMDV, zbudowany w Pythonie
A Turing Machine Simulator
MIT's spacecraft simulator for control algorithm development
black_rhino is a multi-agent simulator for financial network analysis
Demonstrate errors in transmission of a file over a noisy channel.