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.
ET GeoTools improves the editing capabilites of ArcGIS.
The ArcGIS API for Silverlight enables you to mapping and geocoding.
It is a plug-in that provides interoperability between AutoCAD and ArcGIS.
