General

American Society of International Law
Center for Oceans Law and Policy
Environmental Treaties and Resource Indicators
Institute of International Economic Law (John Jackson)
Lamont-Doherty Earth Observatory of Columbia University
Monterey Bay Aquarium Research Institute
The National Academies
National Oceanographic and Atmospheric Administration
OceanLaw.net
OceanLaw.org (Largely concerns UNCLOS)
Oceanography Virtual Library
NSNet (The maritime industry guide to the internet)
Maryland Sea Grant Program
Scripps Institution of Oceangraphy
Multilateral Conventions from the Fletcher School of Law and Diplomacy
Common Heritage
University of Bologna Research Guide to International Law on the Internet
Woods Hole Oceanographic Institution
World News Connection

U.S. Government

EPA Office of Oceans, Coasts, & Estuaries
U.S. Coast Guard
Congress (Library of Congress)
U.S. Courts
U.S. Department of Commerce National Oceanic and Atmospheric Admin. Library
U.S. Dept. of State Bureau of Oceans and International Environmental and Scientific Affairs
U.S. Department of Transportation, Maritime Administration
White House

International Organizations

Intergovernmental Oceanographic Commission
United Nations
United Nations International Maritime Organization
United Nations Treaty Collection

Nongovernmental Organizations

Citizens for Global Solutions: Law of the Sea
Greenpeace
Friends of the Earth
Sierra Club