The A32NX & A380X Project are community driven open source projects
VHDL 2008/93/87 simulator
Model-rocketry aerodynamics and trajectory simulation software
Enigma Encryption Simulator in Java
An interior design application to draw house plans & arrange furniture
Data Analysis, Simulations and Visualization on the Sphere
Digital Circuits Design and Simulation
A Dassault Aviation project to simplify the building of prototypes
An EnergyPlus shell for parametric studies and more ...
For monitoring and control of distributed generation and consumption
Queueing Theory Algorithms
Virtual X-Ray Imaging Library on GPU
JASI - Java Event-Based Simulation Framework
Class library for computational cybernetics
CFDTool - Easy to Use Computational Fluid Dynamics (CFD) Toolbox
Component, CA, and CCA models; superdense time, DB repo, testing, etc.
Use simulation to perform statistical analyses.
ASALI is an open-source code for chemical engineers
Frevo is probably the simplest tool for evolutionary design