Following are websites and organisations that we have found to be helpful in finding information, resources, and support on a wide range of cancer-related topics.

www.abta.org
For 37 years, the American Brain Tumor Association (ABTA) has provided critical funding to researchers working toward breakthroughs in brain tumor diagnosis, treatment and care, with the ultimate goal of finding a cure. The ABTA is also the recognized resource for comprehensive, up-to-date information and compassionate support for the brain tumor patients, families and caregivers who are living with this disease.

Pediatric Oncology Resource Center (Ped-Onc) is a helpful website for parents, friends, and families of children who have or had childhood cancer. Resources and information for parents of children with cancer . . . by parents of children with cancer.
The research is clear: raising compassionate, caring kids improves the health of your child, your family and your community. Parents can actually help children build their empathy “muscles” by giving them opportunities to practice caring.Big-Hearted Families offers simple, fun and engaging activities for your family to live generously. Some projects are short and simple while others are more involved. Some take planning, while others require spontaneity. There are ideas to suit every family’s style.
With chartered divisions throughout the country and over 3,400 local offices, the American Cancer Society(ACS) is committed to fighting cancer through balanced programs of research, education, patient service, and rehabilitation.
www.cancersourcekids.com
This site was developed by pediatric oncology nurses to help children, teens and parents learn about specific types of cancers, and to provide age-appropriate information on testing, diagnosis and treatment. An especially good site for siblings and young family members.
With chartered divisions throughout the country and over 3,400 local offices, the American Cancer Society(ACS) is committed to fighting cancer through balanced programs of research, education, patient service, and rehabilitation.
www.candlelighters.org
A non-profit organization providing support, education and advocacy for families of children with cancer and the professionals caring for them. Links to Hopelink Clinical Trial service, which helps patients find clinical trials to meet their needs. Also contains links to other websites, with topics including assistance with medications, pain control, complementary therapies and support groups.
www.caringbridge.com
An online service that allows you to create a free personalized web page to keep friends and family in touch and informed during important life events, including medical treatment.
Chemo to the Rescue, a children's book on Leukemia, written by a child and his mother going through her ALL treatment.
Children Battling Cancer, Inc. will serve as that bridge in the gap between the community and the families in desperate need of their support, by bringing the two sides together through fundraising, special events, service days and more.
This non-profit organization provides emotional and medical support to children with cancer and their families. The site has links to several resources (listed categorically, and very extensive). Families can also download applications and guidelines for receiving financial assistance for expenses related to cancer treatment.
This non-profit organozation provides kids with cancer a higher quality of life for themselves and their families while facing the challenges of cancer. They offer different things to their families: A learning center, care packages, a connection newsletter...
www.cureourchildren.org
A centralized internet information site to assist parents, families and caregivers of children who have cancer and other life threatening diseases.
Comforting Waters enables people to swim with wild dolphins in the Bahamas.They are dedicated to enhancing people’s lives to facilitate reaching their optimum potential in all aspects ~ physical, mental, spiritual. These are all intertwined, each creating a balance for greater fulfillment in the journey of life.
Patricia, the founder has witnessed first-hand the effects the wild dolphins have on a variety of people, and has no doubt there is great benefit brought to those who participate. 
Dreammakers for Life restores dreams to seriously ill children and their families.  All too quickly, a doctor's diagnosis turns a child's world upside down.  At times it is difficult for children and their families to look beyond the barrage of treatments, needles, and chemo which steals their hopes and dreams.  Dreammakers for Life designed the "Dream Pack" to revive those dreams, and to inspire a child to envision a future abundant in hope.
Different Gilda's Clubs have different programs for children with cancer and their families, but potentially a clubhouse could have groups for children and teens with cancer, groups for siblings, and groups for parents. Also a big part of Gilda's Club is workshops and classes.
This comprehensive site details hospice services and provides a guide for deciding on a program. Also contains information for patients regarding pain control, as well as excellent resources for caregiver support and bereavement (specific to children and teenagers). 
Lainie's Angels is a national non-profit organization that creates family support groups in institutions that treat children with cancer and blood disorders.
The support group starts with the Parent Advocate, who is a trained volunteer assigned to a family. Parent Advocates are people who have been through the experience themselves and have been trained to work with the doctors, nurses, administrators, insurance companies, government agencies and other support programs to meet the needs of the family.
“Little Smiles” is a non-profit 501(c)3 organization that provides toys, games, DVD’s, computers, VIP outings, celebrity meet and greets, concert, sporting event tickets, theme park tickets, fun food runs, nerf gun wars and much, much more…for children in local hospitals, hospices and shelters. We pride ourselves on being local, immediate, and hands on; and our Board of Directors is comprised of all volunteers.
The Leukemia & Lymphoma Society (LLS) is the world's largest voluntary health organization dedicated to funding blood cancer research, education and patient services. LLS's mission: Cure leukemia, lymphoma, Hodgkin's disease and myeloma, and improve the quality of life of patients and their families. Since the first funding in 1954, LLS has awarded more than $680 million in research funding.
www.nccf.org
This foundation raises funds to support the Children's Oncology Group (COG), a major research network that strives to help all children with cancer gain access to the most comprehensive and current care. You can access lists of COG locations throughout North America, Australia and Europe on this site. There is also a section on specific childhood cancers, with a good explanation of clinical trials.
www.nci.nih.gov
The federal government's main agency for cancer research, training and advocacy. The site is a thorough resource, and a good place to start your research. Has information on any type of cancer and its treatment, finding and understanding appropriate clinical trials, and contains links to support groups.
Operation Sunshine Family Therapy Programmes is a UK based International Charity which aims to bring joy and healing into the lives of those with additional needs through dolphin inspired education and art, community projects and family retreats.
The Ronald MC Donald House helps families address their problems regarding health care.
Whether those problems involve how to stay near and support a hospitalized child, how to afford staying together in another city while a child is undergoing treatment, or even getting basic medical and dental care in a vulnerable community.
www.royalmarsden.org/captchemoAn interactive educational site created by a teenager with cancer in order to explain the disease, its treatment and its side effects to children and teens, using factual text, games and animated video.
We help seriously ill children and their families cope with their pain, fear and isolation through entertainment, education and family activities.
St. Jude is unlike any other pediatric treatment and research facility. Discoveries made here have completely changed how the world treats children with cancer and other catastrophic diseases. With research and patient care under one roof, St. Jude is where some of today's most gifted researchers are able to do science more quickly.
Team In Training (TNT), The Leukemia & Lymphoma Society's (LLS) groundbreaking charity sports training program, has reached a remarkable milestone of raising $1 billion to support blood cancer research and patient services.
Since 1980, the Make-A-Wish Foundation® has enriched the lives of children with life-threatening medical conditions through its wish-granting work. The Foundation's mission reflects the life-changing impact that a Make-A-Wish® experience has on children, families, referral sources, donors, sponsors and entire communities.