Smartflood can access the web application via its official website http://gecosistema.com/smartflood
The GFA tool executable code and documentation is in the public domain. It may be used, copied, distributed, or redistributed freely. The plugin described by this document can be downloaded for free from the QGIS plugin repository and from the website (https://github.com/HydroLAB-UNIBAS/GFA-Geomorphic-Flood-Area
An automated procedure for the detection of flood prone areas: r.hazard.flood
https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.hazard.flood/