. frd plugin for calculix
Calculix has a own post processing tool called Calculix graphics window(cgx) .The colour plot is not look good if postprocessing possible in calculix means that will be very good.
CalculiX 2.13 has new function:
"An adapter allows to couple CalculiX via preCICE to other solvers (e.g. OpenFOAM, SU2, or any in-house solver) for fluid-structure interaction."