Sites I Like

Sensory equipment purchase
http://www.lifeskills4kids.com.au (good quality resources)
http://www.mydiffability.com.au (good range of resources)
http://www.empind.com.au (helpful equipment with a reasonable price tag)

Sensory processing information
https://pathways.org (great information on motor and sensory development)
http://www.spdfoundation.net (extensive website with loads of checklists and references)
http://asensorylife.com (excellent information on sensory issues and practical ways to help)

Autism spectrum information
http://www.amaze.org.au (very user friendly information)
http://www.autism.org.uk (Outstanding range of useful, practical information available by typing key word into search box. Information is in an easy-to-read style and easy to print out as well.)

Attention and learning information
https://www.understood.org (Brilliant site with loads of definitions and recommendations available)

Activities
http://www.twinkl.co.uk (some free downloads but membership allows a seemingly endless and amazing range of resources like dot-to -dot, mazes and the ability to create your own resources like activity schedules and reward charts)
http://www.ot-mom-learning-activities.com (great downloadable resources and booklets)
http://mamaot.com (lots of information, range of topics and ideas)