A easy to use Digital IC prototyping software
A collection of lecture notes and accompanying code on micromechanics
action/combat flight sim
ASALI is an open-source code for chemical engineers
Open source software calculating industrial noise in the environment
Enigma Encryption Simulator in Java
The Repast Suite is a family of free agent-based modeling libraries.
Skyscrapersim Abandoned
A multi-modeling and simulation environment to study complex systems