Links
"Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it." - Samuel Johnson
Rules and Texts:
One World by Night - The parent site for the chronicles. All the official bylaws and regulations can be found here, as well as links to clan pages and other chronicles to visit.
Drive Thru RPG - Vampire:the Masquerade books available as downloadable PDFs.
Playing Information and Articles:
General
Sanguinus Curae - plenty of informative articles, especially on clans and things to think about when playing (see Vampire Facts and Maturity and Personal Horror for examples of well-thought out articles). Also, the "Print-friendly Version" at the bottom of the page prints out beautifully...
Blacklight Productions - more good articles.
Clan-Specific
Malkavian Web - random thoughts and bizarreness for Malkavians.
Miscelleny:
Fang Creations - Custom Fangs
Dnash Fangs - Custom Fangs
Vampire Wear - Clothing, Jewelry, etc