General:
The American Association of Allergy, Asthma and Immunology - aaaai.org
The Food Allergy & Anaphylaxis Network – foodallergy.org
The Allergy Kids Foundation – allergykids.com
For Gluten and Celiac:
Celiac Disease Foundation - celiac.org
Celiac.com – online since 1995 - celiac.com
The Gluten Free Dietitian – glutenfreedietitian.com