This is the development version of OpenCalphad, normally updated a few times each month.
The stable version can be downloaded from http://opencalphad.org either as a zip file or as a precompiled installation for Windows.
OpenCalphad is a free thermodynamic software for calculation of multicomponent equilibria, property and phase diagrams and for database development. It has a simple command line interface and an Application Software Interface (OCASI) for integration in simulation software. For simulations it can calculate equilibria in parallel using OpenMP.
There is a community room for questions and discussions at https://gitter.im/opencalphad/opencalphad#
A third party Graphical User Interface (GUI) of OpenCalphad (named as OpenCalphad CAE) for Windows can be downloaded from this link.