"Yoga" means Union, Union with Power of Divine Love. Yoga is one of the six classic systems of Hindu philosophy and holds that through the practice of certain disciplines you may achieve liberation from the limitations of flesh, the delusions of sense, and the pitfalls of thought, thus attaining union with the object of knowledge. It is knowledge that is the goal of all Yoga practices. In fact, Yoga doctrine insists that physical and mental training is to be used only as a means to spiritual ends.
Extensive reference site focuses on yoga philosophy (primarily Kriya), masters and practices. Also offers free yoga software, teacher directory, links to a wide range of resources, books and videos for sale.