Occult

Magic isn't my thing, but it's fascinating nonetheless.

— Academic study —

Journals

Correspondences - active peer-reviewed journal on esotericism

Esoterica - like Correspondences, but inactive

Organizations

European Society for the Study of Western Esotericism - exactly what it sounds like

— Magical practice —

Divination

Aeclectic Tarot - lists of tarot, Lenormand, and oracle decks with photos and reviews

Nietzschemanteion - bibliomancy with Friedrich Nietzsche quotes

Libraries

La Ciencia Real - documents on occultism in English and Spanish

eneruru - forum and resources for Mesopotamian studies (including magic)

Grimoire Magic - manuscripts of magical grimoires and educational materials related to them

The Hermetic Library - open access occultism, especially Hermeticism and Thelema

Internet Sacred Text Archive - online books on folklore, mythology, religion, and the esoteric

O.T.O. U.S.A. Library - library of the Ordo Templi Orientis in the United States

Twilit Grotto - archive of very old esoteric literature

Organizations

Esoteric Order of Dagon - occult lodges working Lovecraftian magic since 1981

Esoteric Order of Dagon - an internet-based Lovecraftian group with a unique Temple of Abzu system of magic

Publications

Journal of the Western Mystery Tradition - defunct journal by and for occultists

Thelemic Union - modern voices of Thelema