The National Autistic Society- UK based web site serving parents and professionals working with children and adults with ASD related conditions. A wealth of information available on this site as well as many informative courses and details of products:

www.nas.org.uk

The Sound Learning Centre- London based centre for sensory integration therapy and neurodevelopmental delay assessment:

www.thesoundlearningcentre.co.uk

Raising Kids

This site is a general site for parents, with forums on specific areas including autism.  there is a lot of advice and guidance on this site for parenting children with disabilities

www.raisingkids.co.uk

The Sensory Processing Disorder Foundation

This is a US based website which provides in depth reading about sensory processing disorder, as well as a great deal of information, advice and recommended resources for sensory integration

www.spd.network.org