You could have downloaded NetpathXL 1.4.7869 from our software library for free. Our antivirus check shows that this download is malware free. This free software is a product of USGS. The software lies within Education Tools, more precisely Science Tools. The latest version of the program is supported on PCs running Windows XP/Vista/7/8/10/11, 32-bit. Netpathxl.exe is the frequent file name to indicate this program's installer. The most popular versions of the tool are 1.4, 1.3 and 1.1.
From the developer:
NETPATH is an interactive Fortran 77 computer program used to interpret net geochemical mass-balance reactions between an initial and final water along a hydrologic flow path. Alternatively, NETPATH computes the mixing proportions of two to five initial waters and net geochemical reactions that can account for the observed composition of a final water.
You may want to check out more software, such as SatCalc, MemBrain or wxMaxima, which might be related to NetpathXL.