IODE: http://www.iode.org/ 

WMO: http://www.wmo.ch/index-en.html

JCOMM: http://ioc.unesco.org/jcomm/index.php

IODE Expertise. Pilot Project 3: http://ioc3.unesco.org/iode/categories.php?category_no=106

OPeNDAP: http://opendap.org/ , http://www.unidata.ucar.edu/packages/dods/

GRID information center: http://biogrid.bnl.gov/ , http://www.globus.org/ogsa/

CDI: http://www.sea-search.net

WMO metadata standard: http://grdc.bafg.de/servlet/is/5257/?lang=en, http://www.wmo.ch/web/www/metadata/WMO-core-metadata-toc.html

ESIMO-project: http://data.oceaninfo.ru/resource/

DiGIR project: http://digir.sourceforge.net/