Accademia del Profumo: Italian version of The Fragrance Foundation. Site in Italian and English.
Barcelona Perfume Museum: nice site with lots of information on the history of perfume.
CosmeticsINFO: the consumer website of the Personal Care Products Council (formerly the Cosmetic, Toiletry, and Fragrance Association). Focus is on safety information.
Fragrance Foundation: the non-profit, educational arm of the international fragrance industry (US site).
International Fragrance Association (IFRA): founded to "represent the collective interests of the fragrance industry worldwide". Little if any consumer information, but a good place to start if you want to learn about the "self-regulatory practices of the international fragrance industry".
International Perfume Museum: in Grasse. Nice site with lots of background information on perfume.
Le Parfum Quelques Gouttes de Luxe: consumer site of the Comité Francais du Parfum. Site in French.
Natural Perfumers Guild: an organization "dedicated to the fostering of the art of natural perfumery through education, legislative efforts and networking among members".
Osmotheque: the "living" perfume museum in Versaille. Site in French.
Sense of Smell Institute: interesting links on the science of olfaction.