ArcGIS Explorer is a lightweight desktop client for ArcGIS Server. It lets you connect via the Web to 2D and 3D data published by ESRI as well as by others, and fuse it with your own local data. Users of ArcGIS Explorer can perform a wide variety of queries on their maps, customize their map displays, and easily e-mail their projects directly from the application.

ArcGIS Explorer is a free downloadable application that offers an easy way to access online GIS content and capabilities. With ArcGIS Explorer, you can connect to a variety of free, ready-to-use datasets hosted by ESRI. Combine these with your own local data or other 2D and 3D Web services to create custom maps and perform spatial analysis.With ArcGIS Explorer, you can:

• Fuse your local data with data and services from ArcGIS Server, ArcIMS, and Open Geospatial Consortium WMS to create custom maps.
• Perform GIS analysis (e.g., visibility, modeling, proximity search).
• Use custom tasks to manage, edit, and analyze your data.
• Share your maps and results with others.