VHDL 2008/93/87 simulator
PICSimLab is a realtime emulator for PIC, Arduino, STM32, ESP32, ...
An advanced network simulator to design and configure virtual networks
Plug&Play Hardware simulation over a virtual bus system.
A simulator for drones, cars and more, built on Unreal Engine
AVR simulator IDE
A software gps simulator
MGSyn - Automatic Synthesis for Industrial Automation
MIT's spacecraft simulator for control algorithm development
ParallelSim is a parallel processor simulator written in java.
A library that allows programs for a NI CRIO to be run on a computer.