DAN
Homepage for the Divers Alert Network - DAN is a not-for-profit 501(C)(3) organization that provides emergency medical advice and assistance for underwater diving injuries, and underwrites a wide range of research, education and training programs that promote safe diving. DAN is supported by more than 200,000 fellow divers with a further 60,000 international divers supporting DAN Europe, DAN Japan, DAN Southeast Asia Pacific and DAN Southern Africa. http://www.dan.org/about/welcome.asp
Dan is my buddy
The DAN Student Membership Program is unique and free to all entry-level divers, in certain regions. When you enroll to become a student member, you'll receive many valuable benefits , including up to $20,000 recompression treatment insurance. Of course, it's unlikely you'll ever need to use it, but it provides peace of mind while you concentrate on learning to dive. http://www.diversalertnetwork.org/dimb/home.asp
IAHD
International Association of Handicapped Divers - Non-profit organization that gives disabled people the chance to discover the beauty of diving. http://www.iahd.org/
Project Aware
The dive industry's leading non-profit environmental organization." Conserving underwater environments through education, advocacy and action" http://www.projectaware.org/