FEATool Multiphysics is an easy-to-use FEA and CFD Simulation Toolbox
Static and Dynamic Structural Analysis of 2D and 3D frames.
An open source controller for Scalextric community
A package for Isogeometric Analysis in Octave and Matlab
Open source 3D Matlab Isogeometric Analysis Code
collection of illustrative programs:small games, simulators: C, Matlab