AIDA - Frediving association that santions competitions and sets training guidelines for courses to learn safe freediving
SpearoBlog - Great site with tons of information on spearfishing and an incredible weekly podcast full of great info, tips and interviews
Andre Spearguns - Incredible hand-made wooden (teak and others) spearguns from Bali / Indonesia!
MerNetwork - The leading online forum for all things mermaid
MermaidCanada - An online mermaid source with new and exciting content