http://www.cureautismnow.org/
Cure Autism Now

http://www.autism-society.org/site/PageServer
Autism Society of America

http://www.generationrescue.org/
Generation Rescue (parents)

http://www.autism.org/contents.html
Center for the Study of Autism

http://www.autism-resources.com/
Autism Resources

http://www.nimh.nih.gov/publicat/autism.cfm
National Institute of Mental Health publication

http://www.nas.org.uk/
The National Autistic Society – in the UK

http://www.autismtoday.com/
Autism Today (a commercial site)