The following software packages are not endorsed by Mining Geology HQ but are free open-source software.
GSLIB (64 bit) - The classic open-source software package used globally. If you're after a more visually appealing version, try the paid version of WinGsLib at gslib.com. This program accompanies the training package provided by Statios.
SGeMS - The Stanford Geostatistical Modeling Software (SGeMS) is an open-source computer package for geostatistics. It provides geostatistics practitioners with a user-friendly interface, an interactive 3-D visualization, and a wide selection of algorithms.
Geoscience ANALYST - Developed by Mira Geoscience, this free 3D visualization and communication software is for integrated, multi-disciplinary earth models and data. Check out the video here.
PairQA (32 and 64 bit) - Developed by Xstract Mining Consultants, PairQA calculates the Average Coefficient of Variation (CVAVR (%)) and the Reduced Major Axis Regression (RMA). The purpose is to define an unbiased measurement of error for duplicate samples. The software is based on published work on the Average Coefficient of Variation by Stanley and Lawie (2007) and Abzalov (2008), and for the Reduced Major Axis Regression by Sinclair and Blackwell (2002).
Google Refine 2.5 - A great little tool for cleaning up those messy drilling databases from the past 50 years.
PyGSLIB - An exciting open sourced project combining python with gslib. Check out the documentation and how to install here.
GSLIB Rotation View Tool - This handy little tool helps you work out the various directional schemes betweeen Vulcan, Isatis, GSLIB, and others.
More software links coming soon!