NEW! CalculiX Launcher for Ubuntu Linux (CCX2.8p2+CGX+modified UNV, MSH converters)
CalculiX Binaries for MS Windows, made with cygwin and ARPACK libraries. CalculiX is most popular FEA open-source package. Good for structural, mechanical, thermal and fluid applications (trusses, plates, frames, shells, solid bodies). It has powerful nonlinear capabilities (including tension/compression only material like concrete) and most types of analysis (modal, buckling, etc) .
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Another windows version