Geospatial Modelling Environment (GME) is a suite of spatial analysis tools for use with ArcGIS 10.0 and 10.1. It is an open source, free standalone program with a GUI and a command line for scripting. Recursive processes can be scripted by separating commands with a semicolon. GME introduces the ability to incorporate both personal and file geodatabases as data sources and allows for batch processing.
The installation of R, a free open source statistical analysis program is required to for some analytical, statistical and graphing functionality in GME.
GME replaces Hawth's Tools, which is compatible with ArcGIS 9.x (it is only recommended for use with ArcGIS 9.2). Limitations of GME include the need for typing command lines for many tools in GME and R for certain functions. GME functions are not currently available as tools or add-ons in ArcMap. GME is still in the beta stage.