User-friendly Desktop Internet GIS (UDIG)
The User-friendly Desktop Internet GIS (uDig) is both a GeoSpatial application and a platform through which developers can create new, derived applications. uDig is a core element in an internet aware Geographic Information System.
uDig has been developed with a strong emphasis on supporting the public standards being developed by the Open Geospatial Consortium, and with a special focus on the Web Map Server and Web Feature Server standards.
For more detail: http://udig.refractions.net/confluence/display/UDIG/Home