Goddess Power: Detailed descriptions of the Archetypes, unfortunately only of the Goddesses. She has an amazing, detailed quiz to help you figure out your archetype as well.
Library of Halexandria: Descriptions of the Archetypes
Theoi Greek Mythology: Massive, detailed database of everything Greek mythology, including quotes from various Greek writings
Links on Jungian Psychology
Major Archetypes and the Process of Individuation: A short explanation of Jungian archetypes
The Jung Lexicon: Primer on Jungian terminology by Daryl Sharp, M.A.
Jules Cashford: Interpretations of fairy tales
Links on the Tarot
American Tarot Association: James Rioux's absolutely brilliant explorations of the tarot. Anyone who's at all interested in tarot should check him out
Tarot Teachings: Website on all things tarot
'Paranormality: Short interpretation of tarot cards
Links on Astrology
Cafe Astrology: A font of wisdom about astrology
Skyscript: More astrology information
Astrolabe: Free basic natal chart with descriptions of planets in signs
Astro Dienst: Various free charts (composite, synastry, etc.)
Judy Hall: Karmic astrology - you'll probably notice I have some books by her. The woman is a genius.
Heal Past Lives: A self guided past life regression
Dream analysis.info: Great site with detailed information about dream analysis
The Real Meaning of Dreams: Another great resource for information about dreams.
Thelamepedia: Wikipedia for magic and gnosis (hidden truth). The section on the Tree of Life is detailed and informative.
The Gnosis Archive: All things Gnostic, from daily meditations to library
I-Ching Fortune: Hexagram interpretations
House of the Sun Alchemy Pages: A brief exploration of alchemy
The Way of the Dream by Fraser Boa (film series about dream interpretation with Marie-Louise von Franz)
On Depth Psychology: It’s Meaning and Magic by Bonnie Bright
C. G. Jung and the Alchemical Renewal by Stephen A. Hoeller
Interview with Marie-Louise von Franz by Hein Stufkens
"In a love relationship... you risk everything. You put yourself on a table, you stop the power game and the trying to dominate or conquer the other person. If you succeed in really loving the other person, if you really relate, then all sorts of miracles happen."
Anything by Jean Shinoda Bolen, C.G. Jung, James Hillman or Marie-Louise von Franz. Some specific books are:
The Interpretation of Fairy Tales by Marie-Louise von Franz
Shadow and Evil in Fairy Tales by Marie-Louise von Franz
Feminine in Fairy Tales by Marie-Louise von Franz
Individuation in Fairy Tales by Marie-Louise von Franz
Alchemy: An Introduction to the Symbolism and the Psychology by Marie-Louise von Franz