| CFIDS Association of America: Chronic fatigue syndrome information, support and advocacy resources, including a grassroots on-line action center. |
| Alison Hunter Memorial Foundation: Myalgic encephalopathy and chronic fatigue syndrome information for patients and medical professionals. |
| American Association for Chronic Fatigue Syndrome - AACFS: Organization of research scientists, physicians, licensed medical healthcare professionals, and other individuals and institutions interested in promoting the stimulation, coordination, and exchange of ideas for CFS research and patient care. |
| American M.E. Society: The Myalgic Encephalomyelitis Society of America concentrates on CFS research information and advocacy issues. |
| CFIDS Charitable Alliance Inc.: An organization for sufferers of CFIDS, fibromyalgia and related disorders. Includes email groups to chat. |
| CFIDS Emergency Relief Services, Inc.: Helps primarily people with chronic fatigue syndrome, who having no other recourse, would endure hunger, homelessness and/or medical deprivation. |
| CFIDS/Fibromyalgia Self-Help: An organization that provides a solution-oriented self-help program for people coping with CFIDS, fibromyalgia or related illnesses, offered over the Internet |
| FM-CFS Canada: Canadian national, registered-charity devoted to fibromyalgia and chronic fatigue syndrome, advancing education, research and treatment. |
| M.E.S.S.: Myalgic Encephalomyelitis (CFS) Support Services offers information and support for CFS patients. |
| ME/Chronic Fatigue Syndrome Society of NSW Inc.: This site includes information on what the Society offers, the disease, further reading and downloadable brochures. |
| National CFIDS Foundation: The NCF is a national non-profit that funds research and provides information, education, and support to people who have chronic fatigue syndrome, also known as CFIDS and M.E. |
| New Jersey Chronic Fatigue Syndrome Association: An organization of people with CFS which supports, informs and helps patients to deal with this serious illness. An in depth look at this syndrome as well as frequently asked questions. |
| Nightingale Research Foundation: A Canadian organization dedicated to the study and treatment of M.E./CFS. |
| R.E.S.C.I.N.D.: Promotes recognition of four related conditions: CFIDS/M.E. (chronic fatigue syndrome), fibromyalgia, Gulf war syndrome, and multiple chemical sensitivity. |
| Seattle CFS and Fibro: Support and resources for patients with chronic fatigue syndrome, fibromyalgia, and related disorders. Local, regional, and on-line resources. |
| The CFS Research Foundation: This UK charity supports research aimed at understanding chronic fatigue syndrome (also known as M.E.) and its treatment. |
| The Connecticut CFIDS & FM Association, Inc.: Providing support to patients in Connecticut with chronic fatigue immune dysfunction syndrome, CFIDS, chronic fatigue syndrome, CFS, fibromyalgia syndrome, FM. |
| The M.E. Association: The official website for UK-based charity covering everything from their latest research to advice on applying for benefits. |
| The Myalgic Encephalomyelitis Association of Ontario: Offers info, tips, and support to those coping with ME/CFS and related illnesses, including youth and parents. |
| Waterloo Wellington Myalgic Encephalomyelitis Association: A Canadian organization providing information about M.E., including coping strategies, diagnosing, the history, finding a physician and other related links. |
| Wisconsin Chronic Fatigue Syndrome Association: An information, advocacy and support organization for CFS and Fibromyalgia Syndrome. |