John George Hohman's Pow-Wows; or, Long Lost Friend: This text, especially beloved of author Manly Wade Wellman, is an 1820s Pennsylvania Dutch collection of spells and talismans.

Hex and Spellwork: The Magical Practices of the Pennsylvania Dutch: A book about the Swiss-German tradition of Christian-grounded magic.

Powwowing: A Persistent American Esoteric Tradition: An article on the magic of the Pennsylvania Dutch.

Liber Armadel: A book on summoning angels. I once owned a lovely facsimile edition of this book.

The Book of Enoch: A fascinating text that describes the history of the angels' fall.

More Enochian Magick: A number of links to various Enochian texts ("angel magick")

Gnostic Christian Apocrypha: The texts that were voted out of the Bible.

Alchemical Writings: A highly detailed site on all things alchemical.

Archives of Western Esoterica: Here be texts full of demons and angels.

Internet Sacred Text Archive: Sacred texts from religions around the world.

Christian Wicca: Hey, the concept baffles me, too. But here's a list of sites about Christian witchcraft. (We Catholics just slip into Mariolatry, er, I mean, hyperdulia, when we feel the need for a divine feminine....)