The US Army Corps of Engineers Geospatial Data Clearinghouse allows you to view national data and metadata available for download as well as provide metadata software. Users can also submit their own metadata to the clearinghouse. The metadata on this site include the Active Map of USACE Commands, the texual list of USACE commands and the National Geospatial Data Clearinghouse. Summary provided by http://corpsgeo1.usace.army.mil/
DOD/USARMY/USACE/GDCN
DOD