There are really good free and open source research FEA & CFD codes available, like FEniCS, Moose, Nek5000, OpenFOAM, SU2 and more. However, being research codes they can be difficult to learn and sometimes even compile and get running, that is why FEATool Multiphysics has been developed [1] - an integrated physics simulation platform with the aim of allowing users to run "any" CAE simulation solver from an easy to use GUI and unified scripting environment.
[1] https://www.featool.com