Organizations:
FEZANA (Federation of Zoroastrian Associations of North America)
WZO (World Zoroastrian Organization)
HOW (The Hearth of Wisdom) (Interested in becoming a Zoroastrian? Start here! Pablo is HOW’s Resident Theologian)
Research:
Encyclopaedia Iranica (Best academic resource for anything Mazdayasni or Iranic [trust this over Wikipedia!])
Avesta – Zoroastrian Archives (A trove of public domain works relating to Mazdayasna)
Video Lectures by Pablo:
“The Gathas, Zoroastrianism, and the Ancient World”
“The Wisdom of Mazdayasna”
Mazdayasni Online 