. 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.
I completely agree, an CalculiX integration would be totally beneficial.
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."