These are some of my faves.
The EFT site has already been mentioned... but it is awesome so it deserves to be mentioned again:
EFT Home - World Center for EFT (Emotional Freedom Techniques)
This is the best free source of Yoga theory and technique I have found on the web, and it is also an excellent site for Zen and Meditation... tons of videos and articles:
Free Guided Meditation Techniques, Chakra Kundalini Yoga & Zen
And finally, one of my own... with a free audio e-course:
Global Alchemy Spiritual LIfe Coaching
keep smiling...
Ben