FlightGear Flight Simulator: free open-source multiplatform flight sim
General Mission Analysis Tool
PICSimLab is a realtime emulator for PIC, Arduino, STM32, ESP32, ...
Random phenomena generator
DIS(IEEE 1278.1) Fully Implemented in C++
PySCeS is the Python Simulator of Cellular Systems
A multi-modeling and simulation environment to study complex systems
An Agent-Based Simulation of Invasive Pest Insects
Growing suite of proteomics simulations for educational purposes
GMES is a free Python package for FDTD electromagnetic simulations.
Simulation, analysis, and management of the movement of water
A cross-platform, Qt-based software to communicate through serial port
SaaS for running simulation models in the cloud
realistic truck simulator with 3D graphics done from zero