This collection of Processing (formerly Sextante) tools is first structured by Processing version, then by topic, then by subfolders.
Some tools depend on scipy. If you use the OSGeo4W installer, install python-scipy from the lib section in Advanced installation.
Some spatial statistics tools depend on PySAL. If you use the OSGeo4W installer, follow the instructions in http://anitagraser.com/2014/07/13/installing-pysal-for-osgeo4w/ to install this dependency.
To install tools developed for Processing and QGIS 2.x, copy them into
~/.qgis2/processing/models
~/.qgis2/processing/scripts
To install the tools developed for Sextante 1.0.8 and QGIS 1.8, copy them into the appropriate Sextante subfolders which you can find in
~/.qgis/sextante/models
~/.qgis/sextante/scripts
~/.qgis/python/plugins/sextante/ftools
The tools in this repository are free software; you can redistribute them and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.