CalculiX is developed
primarily by Guido Dhondt and Klaus Wittig, employees of MTU Munich.
It runs under *n*x and Microsoft Windows, and is distributed under the
GNU GPL licence. It uses the Abaqus file format and does linear and
non-linear calculations. It consists of
ccx, the solver,
cgx, the pre- and post-processor.
Our Fad finite-element preprocessor can export models in Abaqus format. Currently the export works for Sap 8-node brick elements (type 5), thin-shell elements (type 6) and tetrahedral elements (type 13, as implemented by us).
Extensive documentation is available on the CalculiX Web site.
The following are links to local copies (restricted access) of original documentation as of 2010 Jan:
There is also a CalculiX group.
CandyStore is a GPL-licensed pre- and post-processor especially intended for CalculiX.
Peter A. Gustafson's CalculiX Extras provides CUDA-based solvers and also export to ExodusII format (convenient for use with ParaView and VisIt).