Downloading SINMAP 3.01 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 of the tool is 3.0. The actual developer of the free program is Utah State University.
SINMAP is included in Education Tools. You can set up this free PC software on Windows XP/Vista/7/8/10/11 32-bit. 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.
From the developer:
SINMAP (Stability Index MAPping) is an ArcView extension that implements the computation and mapping of a slope stability index based upon geographic information, primarily digital elevation data.
SINMAP has its theoretical basis in the infinite plane slope stability model with wetness (pore pressures) obtained from a topographically based steady state model of hydrology.
You may want to check out more software, such as f x -Viewer, Trachtenberg Speed Math or MathMatic, which might be related to SINMAP.