EPA Central Data Exchange
http://www.epa.gov/cdx/
NOAA Comprehensive Large Array-data Stewardship System
http://www.class.noaa.gov/.../welcome...
NOAA Telecommunication Gateway (AWIPS)
http://www.nws.noaa.gov/tg/
NOAA: WRT Hub for WMO Global Telecommunication System
http://www.weather.gov/tg/cominfo.html
Unidata Local Data Manager
http://www.unidata.ucar.edu/.../ldm/