International Maritime Organization - United Nations (IMO)
You must first register and create a free log in, but this website has a lot of information. Included in this website are IMO Documents, the Global Integrated Shipping Information System, news and much more.
Admiralty and Maritime Law Guide: includes over 1,500 annotated links to admiralty law resources on the Internet and a growing database of admiralty case digests, opinions and international maritime conventions.
Occupational Safety & Health Administration (OSHA)