Model-rocketry aerodynamics and trajectory simulation software
Enigma Encryption Simulator in Java
An interior design application to draw house plans & arrange furniture
Digital Circuits Design and Simulation
JASI - Java Event-Based Simulation Framework
Queueing Theory Algorithms
Virtual X-Ray Imaging Library on GPU
Component, CA, and CCA models; superdense time, DB repo, testing, etc.
Use simulation to perform statistical analyses.
A Dassault Aviation project to simplify the building of prototypes
CFDTool - Easy to Use Computational Fluid Dynamics (CFD) Toolbox
For monitoring and control of distributed generation and consumption
Frevo is probably the simplest tool for evolutionary design
A simulation library for discrete event and hybrid dynamic systems.
Water & steam properties Java library
DIS(IEEE 1278.1) Fully Implemented in C++
The MaryTTS module for the protoFramework project