PICSimLab is a realtime emulator for PIC, Arduino, STM32, ESP32, ...
AlgoSim : création, analyse et exécution des algorithmes
A framework for implementing real-time control systems
An accurate, scalable, and energy-aware simulator for WSNs
MIT's spacecraft simulator for control algorithm development
realistic truck simulator with 3D graphics done from zero
realistic truck & car simulator, with OpenGL graphics
Electric power system transient simulator