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.
Though some parts are unfinished, the site includes much information on Yoga philosophy, and the practice and benefits of postures, meditation and breathing.
Yoga guide details various yoga traditions including hatha and kundalini, yoga's relationship with Hinduism, and new poses to incorporate into one's yoga classes.
A large yoga resource site with links to teachers, centers, organizations, books, music, therapists, health products, retreats, vacations, personals, and traditions.