American Cancer Society
American Institute for Cancer Research - Focuses on diet and cancer prevention
Association of Cancer Online Resources
Cancer and Chemo - A huge directory put out by CNN.
Cancer Buddies Network - Online buddies for all types of cancer
Cancer Hope Network
Cancernet - Sponsored by the American Society of Clinical Oncology a good reference for multiple cancer issues
Cancercare - Offering education, counseling, financial assistance and help finding special programs for children, caregivers, etc.
The Cancer Crusade - A non denominational site for support as well as a prayer circle.
Cancer Forums.net - A website for discussions about any type of cancer.
Cancer Guide A great resource written by the late Steve Dunn who was a 15 year kidney cancer survivor, who later died of meningitis.
Cancer Network - Website with information about screening, diagnosis, treatment, prevention and more. Lots of research information.
Coalition of Cancer Cooperative Groups
Commission on Cancer
Cure Magazine - The online site for Cure Magazine an excellent source for cancer information written so that you can actually understand it.
The Cancer Hope Network
LessCancer - A campaign to raise awareness of those environmental exposures that are both known and suspected to be cancer-causing.
Lance Armstrong Foundation
Macmillan Cancer Support A multitude of services for residents of the United Kingdom
National Cancer Institute
National Center for Cancer Survivorship
National Coalition for Cancer Survivorship
National Institutes of Health Clinical Trial Site
Oncolink - A good general site with information about virtually all cancers. Interactive program to help develop a survivorship plan.
The Wellness Community - An international non-profit dedicated to providing free support, education and hope to people with cancer and their loved ones.