HP-41cx Emulator
Draw and Simulate Finite States Machines (FSM)
Skyscrapersim Abandoned
OpenNum lets you distribute solvers with a nice graphical interface
A wireless push-type network simulator.
Real-time interactive 3D graphics API for scientific simulations
Utility to show live progress, status & stats for running simulations
Modbus slave simulator
AVR simulator IDE
Simulate an epidemic like the Corona Pandemic and look at statistics
Portable OS X FOSS applications
Antimony is a human-readable, human-writable model definition language
PySCeS Constraint Based Modelling
Radial-velocity & transits analysis tool for exoplanets