FEATool Multiphysics is an easy-to-use FEA and CFD Simulation Toolbox
ASALI is an open-source code for chemical engineers
Building blocks for the renewable energy industry.
The DREAM toolbox is a free open source acoustic field simulation tool
Open source 3D Matlab Isogeometric Analysis Code
MIT's spacecraft simulator for control algorithm development
Toolkit for Automatic Control and Dynamic Optimization