ArcGIS Explorer Desktop is a GIS viewer that gives you an easy way to explore.
ArcGIS Engine is a complete library of embeddable GIS components for developers.
It is a set of tools for ArcGIS that enable the users to create surfaces.
Military Overlay Editor (MOLE) is a set of COM components for developers
It adds projections and geotransformations for use with ArcGIS Explorer Desktop.
