European Directory of Marine Environmental Data (EDMED)
A computer searchable directory of data sets relating to the marine environment compiled in collaboration with centres in eleven European countries.
http://www.sea-search.net/edmed/welcome.html

Geixs
Geixs is the European Geological Data Catalogue. It gives you a dataset description through: the geographic coverage of the data, key words from lexicons and free text.
http://www.eurogeosurveys.org

Micropalaeontological Reference Centres 
See article in SeaBed News Issue 2 
http://www-odp.tamu.edu/mrc/mrcpage.HTML

PANGAEA
Information centre aimed at archiving, publishing and distributing data from Global Change research with special emphasis on paleoclimatic, marine and environmental sciences. Bremerhaven, Germany.
http://www.pangaea.de

Sea-Search
The Sea-Search website has been set up and is being operated and further developed to provide an effective navigation tool to data and information sources for European marine waters, to oceanographic data and information, managed by European centres, and to centres in Europe with expertise and skills in oceanographic and marine data & information management.
http://www.sea-search.net