A co-simulation master for Functional Mockup Units (FMI 1.0 and 2.0).
Draw and Simulate Finite States Machines (FSM)
OpenNum lets you distribute solvers with a nice graphical interface
A wireless push-type network simulator.
NMR Product Operator Calculator
Real-time interactive 3D graphics API for scientific simulations
Modbus slave simulator
AVR simulator IDE
A C++ Matrix Library
Portable OS X FOSS applications
A simulator for biological and physiological models
Simulate an epidemic like the Corona Pandemic and look at statistics
Antimony is a human-readable, human-writable model definition language
PySCeS Constraint Based Modelling
X-ray diffraction (XRD) analysis for hkl simulation of any crystal.