- CHADD - Children and Adults with Attention-Deficit/Hyperactivity Disorder
- NAMI – National Alliance of Mental Illness, ADHD
- NIMH – National Institute of Mental Health, ADHD
- Smart But Scattered Kids
- LD Online
- Information about monotropism
- An unscientific monotropism "quiz"
- CHADD NOVA Meetup
- CHADD Professional Directory
- ADDitude
- Neurodivergent Insights - ADHD infographics