JASI - Java Event-Based Simulation Framework
Modular System for Shelves and Coasts
turn-based wargame/simulator
Neutrality tests using the SNP site frequency spectrum
A network server for the flightgear simulator
A High-level Utility Package for FMI-based Software Development
PySCeS is the Python Simulator of Cellular Systems
HP-41cx Emulator
Draw and Simulate Finite States Machines (FSM)
OpenNum lets you distribute solvers with a nice graphical interface
Industry standard communication with compliant image generators.
A wireless push-type network simulator.
Modbus slave simulator
An EnergyPlus shell for parametric studies and more ...
Portable OS X FOSS applications
A simulator for biological and physiological models