Shyam Space - http://www.shyamspace.com
Official site of Swami Shyam, founder of the International Meditation Institute
.Introduction to the philosophy and technique.Includes writings, excerpts of satsangs, or lectures, and a meditation room.
Siddha Samadhi Yoga - http://www.ssy.org SSA information and centers worldwide.
Sivananda Yoga-Meditation - http://www.sivananda.org/teachings/meditati.htm The basics of incorporating mindfulness into an established practice with links to the other fundamental aspects of yoga.