Fret Calculator 1.0.1.13 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. We recommend checking the downloaded files with any free antivirus. The program lies within Multimedia Tools, more precisely Music Production. The actual developer of the free program is MGCSoft.
From the developer:
A simple program for calculatiing and printing musical instrument fret positions.
You may want to check out more software, such as Beier String and Fret Calculator, Chemical Calculator or Stock Profit Calculator, which might be related to Fret Calculator.