Sensory Processing Disorder Network (SPD Network)
http://www.spdnetwork.org/
Provides resources for individuals with Sensory Processing Disorder (SPD) and for the family members, friends, therapists, physicians, teachers, and researchers who care about and work with them

Sensory Integration Global Network (SIGN)
http://www.siglobalnetwork.org/
A network of volunteers who promote the work of Dr. A. Jean Ayres in sensory integration theory and intervention. The originators of this group include former co-workers and students of Dr. Ayres, who are now among the leading experts in the field, and occupational therapists committed to providing occupational therapy services from a sensory integrative perspective in a manner consistent with Dr. Ayres’ core principles.

The Sensory Integration Network of the UK and Ireland
http://www.sensoryintegration.org.uk/
An organization committed to the promotion and development of sensory integration theory, practice, and research

The American Occupational Therapy Association, Inc.
http://www.aota.org/Consumers/Links/LZ/SI.aspx
A national professional association established in 1917 to represent the interests and concerns of occupational therapy practitioners and students of occupational therapy and to improve the quality of occupational therapy services

SPD Parent S.H.A.R.E
www.spdparentshare.com
An international network of volunteer parent support hosts formed to share information, resources, awareness, and support to SPD families