System for Automated Geoscientific Analyses

 SAGA GIS (System for Automated Geoscientific Analyses) is a free and
 open source geographic information system used for editing and
 analysing spatial data. It includes a large number of modules for the
 analysis of vector (point, line and polygon), table, grid and image
 data. Among others the package includes modules for geostatistics,
 image classification, projections, simulation of dynamic processes
 (hydrology, landscape development) and terrain analysis.
 The functionality can be accessed through a GUI, the command line or
 by using the C++ API.