calc4fem is described as 'Spreadsheet Template for Structural Engineering (FEA Analysis for beams, trusses, 2D-frames). It makes possible to create your own parametric models.Templates for engineering calculation (fatigue, concrete plates' and is an app. There are more than 25 alternatives to calc4fem for Windows, Linux and Mac. The best calc4fem alternative is Etabs. It's not free, so if you're looking for a free alternative, you could try MASTAN2 or Analysis for Windows. Other great apps like calc4fem are SAP2000, Structurix, FRAMEWORK 2D+3D and Estru3D.