The National Vaccine Information Center (NVIC) is a national, non-profit organization dedicated to preventing vaccine injuries and deaths through public education and defending the right to informed consent to vaccination. (Has a Mercury Calculator, How much Mercury has your child received from vaccines?)
http://www.nvic.org/

Many of today's "mystery syndromes" that physicians don't know how to treat at all - fibromyalgia, chronic fatigue, anorexia, recurrent depression - aren't mystery syndromes. They are just mercury poisoning. Treating them as mercury poisoning cures them, while the usual treatments are seldom effective in the long term. This book gives practical guidance on how to tell if you really have chronic mercury poisoning or some other problem. If mercury poisoning is your problem, the book tells you how to get the mercury out of your body, and how to feel good while you do that. www.noamalgam.com

Moms Against Mercury is a non profit organization dedicated to raising awareness while educating the public of the dangerous use of Thimerosal, a mercury based preservative, used in vaccines and the flu shot.
http://momsagainstmercury.org/

Think DMPS is safe? A comprehensive site by Jana, whose life was derailed by one single injection of DMPS. "The discovery that was most disturbing to me was that some physicians and others were misleading (either through ignorance or contrivance) patients about the safety and efficacy of this drug"
http://www.dmpsbackfire.com/default.shtml

Find out who is polluting your zip code, town or neighborhood. Fantastic site that blows the whistle on all the major polluters in your area, heavy metals and other contaminants.
http://www.scorecard.org/

The Coalition for SafeMinds was founded to raise awareness, support research, change policy and focus national attention on the growing evidence of a link between mercury and neurological disorders such as autism, attention deficit disorder, language delay and learning difficulties. Our mission is to end the health and personal devastations caused by the needless exposure to mercury, one of the most neurotoxic substances on earth.
http://www.safeminds.org

A clearinghouse for therapy information, laboratory research and education.
http://www.cellphysics.org

See a video online that show how mercury causes brain neuron degeneration
http://commons.ucalgary.ca

Information on alternative therapies and nutrition for cancer & other diseases.
http://www.cancercontrolsociety.com/

An independent reference laboratory providing data on levels of toxic and essential elements in hair, also elements, amino acids and metabolites in blood and urine.
http://www.doctorsdata.com

IRIS is a database of human health effects that may result from exposure to various substances found in the environment. Toxic substance profiles (EPA).
http://www.epa.gov/ebtpages/polltoxicstoxicologicalprofiles.html

Osha's information on Toxic Heavy Metals Very Informative and practically presented.
http://www.osha.gov/SLTC/metalsheavy/

An organization for dental, medical and research professionals who seek to promote mercury-free dentistry, and raise the standards of scientific biocompatatbility in dental practice.
http://www.iaomt.org/

Famous Smoking Tooth Video: Shows Mercury vapor eminating from an extracted tooth.
http://www.iaomt.org/videos/index.asp

The American Naturopathic Medical Association is the nation's oldest and largest American Association of Naturopathic Physicians. Founded in 1981, ANMA is a nonprofit, scientific, educational, organization, dedicated to exploring new frontiers of mind, body, medicine and health.
http://www.anma.org/

The ATSDR ToxFAQsTM is a series of summaries about hazardous substances developed by the ATSDR Division of Toxicology.
http://www.atsdr.cdc.gov/toxfaq.html

Hal A. Huggins DDS, MS, the world’s most controversial dentist because of his stand on trying to convince dentistry to stop the use of mercury in fillings. During the past 42 years, Dr. Huggins has lectured over 1400 days in 46 states and 13 foreign countries to professional and lay groups and has given over 1000 radio, TV and print media interviews. He has published over 50 articles concerning nutrition, child growth and development, mercury toxicity, root canals and cavitation. http://www.drhuggins.com

Dartmouth College's page of links on the toxicity of priority Superfund metals. Information about toxic heavy metals and the effects on the environment and the the human body. Also, Scientists at Dartmouth College have been awarded a $15 million grant by the U.S. Environmental Protection Agency (EPA) and the National Institute of Environmental Health Sciences (NIEHS) to study the ways that arsenic, mercury, lead and other heavy metals affect human health.

http://dms.dartmouth.edu/news/2000/28mar2000.shtml

http://www.dartmouth.edu/~medi604/metals.html

Dartmouth Toxic Metals Research Program. An awesome site probably the most well rounded educational site.
http://www.dartmouth.edu/~toxmetal/