KABBALAH

THE JEWISH ENCYCLOPEDIA 

The Samuel and Althea Stroum Lectureship in Jewish Studies by Moshe Idel Part I)

The Samuel and Althea Stroum Lectureship in Jewish Studies by Moshe Idel (Part II)

The Samuel and Althea Stroum Lectureship in Jewish Studies by Moshe Idel (Part III)

 
SEFER YETZIRAH & Saadia's Commentary (excerpts)
From Saadia ben Joseph (al-Fayyumi)[931 C.E.], Commentaire sur le Séfer Yesira ou Livre de la Création par Le Gaon Saadya de Fayyoum, trans. & ed., M. Lambert, Paris, Emile Bouillon, Editeur, 1891); translated into English from the French & Hebrew by Scott Thompson and Dominique Marson, San Francisco, 1985.

Kabbalah Links Page
Large selection of Links. "Once you have followed several of these links and appreciate the extent of the written material on Kabbalah, your eyes will begin to glaze over and you may find yourself slumped at your terminal in a catatonic stupor of information overload."

Bnei-Baruch Kabbalah
Authentic Jewish Kabbalah.

The Work of the Chariot
There are several on-line translations of core texts such as the Sepher Yetzirah, some parts of the Zohar, and other works.