CAELinux 2018 is based on Xubuntu 16.04 and contains a full suite of open source simulation tools for FEA, CFD or multiphysics simulation but also a large panel of other engineering software for CAD-CAM & 3D printing, electronics, mathematics & programming.
Based on the open-source CAD/CAM software such as Freecad, LibreCAD, PyCAM and Slic3r and CAE softwares like Salomé, Code_Aster, Code_Saturne, Calculix, OpenFOAM and Elmer , you can design your CAD geometry, perform multiphysics simulations to optimize your design, generate G-code for prototyping with 3D printing & milling, and even develop your own PCBs & microcontroller based electronic circuits for automation.
For example, using Freecad, you can design your parametric CAD geometry with ease, generate a computation mesh and setup your simulation problem in Salome-Meca in a few minutes. After your design is checked you can go on preparing a G-Code for CNC milling a prototype with PyCAM or 3D printing it with Slic3r.
With the integrated open-source tools of CAELinux, you can simulate incredibly complex physics with the open-source FE & CFD solvers Code_Aster, Code-Saturne, OpenFOAM & Elmer: non-linear thermo-mechanics, coupled fluid-structure dynamics, seismic / non-linear explicit dynamics, contacts, visco-plasticity, fluid dynamics, heat exchange, convection heat transfer and radiation in other words nearly all physics problem can be addressed with the integrated solvers!! Then reload your results files in post-processing applications like Salomé, GMSH or Paraview to visualize your data in 3D... And don't forget all these features are based on open-source / free softwares, so now you don't have to pay for any expensive licenses and if you want, you can even improve it.