For research :

Children’s Cancer Institute (Australia)
Childhood Cancer Australia
Neuroblastoma Society UK 
Cure Search (USA)
The Advances in Neuroblastoma Research Association
The Neuroblastoma Consortium (Global)
The Children’s Neuroblastoma Cancer Foundation (USA)
Cancer Advisor (an Australian website that connects to up-to-date, evidence-based information about childhood cancer)

For financial and emotional support:

Red Kite
Cancer Council
Merlin’s Magic Wand
Make a Wish
Feel The Magic Foundation (childhood bereavement support)

For parents who have recently finished treatment:

For parents wanting to find out more about the palliative care: