There was a download of GSI3D 2011.0 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This program was originally created by NERC. The most popular versions of the tool 2011.0, 3.0 and 2.6.
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. This PC program can be installed on 32-bit versions of Windows XP/Vista/7/8/10/11. GSI3D is categorized as Photo & Graphics Tools.
From the developer:
GSI3D is a tool for 3D geological modelling which enables you to quickly and intuitively construct 3D solid models of the subsurface for a wide range of applications. The model is built by enabling the user to construct traditional cross sections by correlating boreholes and outcrop data to produce a network of interlocking sections, or geological fence diagram.
You may want to check out more software, such as Panorama Tools, Smart Map or graphite, which might be similar to GSI3D.