COMSOL Multiphysics 3.5a offers a wide range of features, including:
Websites claiming to offer COMSOL 3.5a for free may contain: Comsol Multiphysics 3.5a Free Download
COMSOL Multiphysics 3.5a is a legacy version of the Finite Element Analysis (FEA) software, released in COMSOL Multiphysics 3