Free mechanical engineering software options include CAELinux 2009, which is a pre-packaged Ubuntu operating system featuring tools like Salome, Aster, OpenFOAM, Code-Saturn, and SciLab. CAELinux 2009 is designed for 64-bit PCs but can be run directly from a DVD. Salome can also be installed on Windows and is useful for solving finite element method (FEM) problems with additional plugins. SciLab serves as a free alternative to Matlab for numerical computing. These tools provide robust capabilities for designing and testing engineering models without cost.