CALCULIX A Free Software Three-Dimensional Structural Finite Element Program Version 2.21 is available Last updated: 1. Aug 10:04:10 CEST 2023 CalculiX is a package designed to solve field problems. The method used is the finite element method. With CalculiX Finite Element Models can be built, calculated and post-processed. The pre- and post-processor is an interactive 3D-tool using the openGL API