American Porphyria Foundation -- Articles and links
Canadian Porphyria Foundation -- Guide to porphyria
Porphyria: A Patient's Guide -- Articles, medical information
National Organization for Rare Disorders -- Definitions of various types of porphyria and links to organizations
Javilk's Porphyria Page -- Medical details and links
Porphyria Web Links -- Simple list of links
University of Cape Town -- UCT scientists find gene defect causing Variegate Porphyria. South African news article.
Yahoo - Health: Diseases and Conditions: Porphyria