• The National Information Center 
  for Children and Youth with Disabilities
• Internet Resources for Special Children
• Disabilities Studies and Services Center

Agenesis of the Corpus Callosum

• NINDS Agenesis of the Corpus Callosum

Attention Deficit Disorder

• National Attention Deficit Disorder Association
• Children and Adults with AD/HD 

Autism

• Autism Society of America
• Autistics.org
• Center for the Study of Autism
• CSAAC 
• Cure Autism Now

Cerebral Palsy

• United Cerebral Palsy
• American Cerebral Palsy Information Center

Child Development

Deafness/Communication

• National Institute on Deafness and
  Other Communication Disorders

Epilepsy

• The American Epilepsy Society
• Epilepsy Foundation

Hydrocephalus

• Hydrocephalus Association
• Hydrocephalus Foundation, Inc. (HyFI)
• International Federation for Hydrocephalus
  and Spina Bifida

Prader-Willi Syndrome

• The Prader-Willi Syndrome Association

Spina Bifida

• Spina Bifida Association of America

Trisomy

• Support Organization for Trisomy

Various Resources

• The Regional Center of Orange County
• The Volunteer Center of Orange County
• Special Olympics
• Easter Seal Society
• St. Margaret's Episcopal School

Blindness

• National Federation of the Blind
• National Association for Visually Handicapped
• American Council of the Blind
• American Foundation for the Blind

Traumatic Brain Injury

• Brain Injury Association

Cleft Palate

• Cleft Palate Foundation (CPF)

Down Syndrome

• National Association for Down Syndrome
• National Down Syndrome Society
• Team Up for Down Syndrome
• Down Syndrome Association of Orange County

Hydronephrosis

Microcephaly

• NINDS Microcephaly

Retinopathy of Prematurity

• The Association for Retinopathy of Prematurity
  and Related Diseases

Tourette Syndrome

• Tourette Syndrome Association, Inc.
• NINDS Tourette Syndrome

Williams Syndrome

• Williams Syndrome Association
• Williams Syndrome Foundation