An advanced network simulator to design and configure virtual networks
A cross-platform statistical package for econometric analysis
General Mission Analysis Tool
SUMO is a microscopic, multi-modal traffic simulation.
FlightGear Flight Simulator: free open-source multiplatform flight sim
System dynamics program with additional features for economics
Industry standard communication with compliant image generators.
EPRI Distribution System Simulator
Simulation for spacecraft attitude control system analysis and design
Earth orbits and satellite coverage display in 3D on your laptop.
Program for the analysis of spectroscopic data, in particular EPR(ESR)
Object-oriented equation-based modelling and optimisation software
Graphical User Interface for Gromacs
Modular System for Shelves and Coasts
A simulation program for the HPA axis.
Discrete System Modeler
A simulation program for thyroid homeostasis.
Frevo is probably the simplest tool for evolutionary design
This is the liquid rocket engine parameter solver Alpha release 1.