OpenThermo 1.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free software was originally developed by Konstantin Tokarev. The software relates to Education Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
OpenThermo is a program package for statistical thermodynamics computations beyond rigid rotor harmonic oscillator approximation (RRHOA), with taking into account internal rotations and vibration anharmonicity.
Such calculations often require individual approach for every molecule, and their difficulty rapidly increase with taking more factors into consideration.
You may want to check out more software, such as StatPlus 2007, Adding Machine or GenScn, which might be similar to OpenThermo.