Downloading DiInSo 1.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The most popular version among the program users is 1.0. DiInSo lies within Education Tools, more precisely Science Tools. This free program is an intellectual property of IPGG SB RAS GeoElectric Laboratory. We recommend checking the downloaded files with any free antivirus.
From the developer:
The Direct-Inverse-Solver (DiInSo) software package is orient to solve direct 3D and inverse 2D/3D electrical resistivity tomography (ERT) problems on direct current (DC).
You may want to check out more software, such as MB Free Muhurtha Astrology, CDtool or Travoltage, which might be related to DiInSo.