Available with Spatial Analyst license.
The ArcGIS Spatial Analyst extension makes a large number of geoprocessing tools available to you, grouped into toolsets of related functionality for ease of access.
The ArcToolbox window
To make the toolbox visible, in the Main menu, click Geoprocessing and click the ArcToolbox button .
Learning about the tools
To find out more information about the Spatial Analyst tools and how to execute them, see the following links: