The ADHD Foundation

The ADHD Foundation Neurodiversity Charity supports parents and carers so they can understand and meet the needs of their child. There are free resources on this website, in addition to services with a fee, such as a range of webinars, courses, resources, and a screening service.

The ADHD Centre

Support for parenting children with ADHD. This site has free resources for parents, in addition to the private services it offers.

ADHD Kids Online

Online support to inspire you and help your ADHD child reach their full potential.

Some useful free resources and advice, as well as paid for services.

Also, lots of links to other ADHD websites for parents on the 'Resources' page.

ADDIS

The National Attention Deficit Disorder 

Information and Support Service.
Provides people-friendly information and resources about Attention Deficit Hyperactivity Disorder to anyone who needs assistance - parents, sufferers, teachers or health professionals. 

Adders.org

Set up in 1998, this site aims to promote awareness of ADHD and provide information and practical advice to sufferers and their families in the UK and around the world. Lots of information, downloadable resources and a comprehensive list of local support groups.