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• CalculiX vs code_astercode_aster is an open-source GPL-3.0 solver from EDF with a large verification suite, running on Linux and the command line, with pre- and post-processing usually in Salome-Meca.
• CalculiX vs Elmer FEMElmer FEM is an open-source finite element package that handles coupled multiphysics problems beyond structural analysis, running on Windows and Linux.
• CalculiX vs Ansys StudentFree student editions of Ansys engineering simulation software for structural, fluid and electronics analysis.
• CalculiX vs SimScaleSimScale moves FEA to a paid browser platform on cloud compute, adding CFD, thermal and electromagnetic analysis, and requires an internet connection and account.