Download of R123Tables 2.0 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The following version: 2.0 is the most frequently downloaded one by the program users.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software is included in Education Tools. This tool was originally created by MegaWatSoft.
From the developer:
The R123 Tables Excel Add-In library calculates 23 thermodynamic properties of R123. It allows 11 different combinations of input variables to be used for calculations. The library is fully integrated in Excel, and available functions can be used in the same way as any other Excel function.
You may want to check out more software, such as Maxima and Minima, IUCLID5 or ECoord, which might be related to R123Tables.