Raja Yoga of Shri Ramchadraji 
Based on the philosophy and practice of Raja yoga as modified by Sri Ramchandraji Maharaj of Shajahanpur.
http://www.sriramchandra.org/Raja Yoga
Sri Swami Sivananda expounds on the philosophy of Yoga, the Sutras of Patanjali, and other aspects of Raja Yoga.
http://www.sivanandadlshq.org/teachings/rajayoga.htm
Sameeksha: Astanga Yoga
Provides brief history of Patanjali's eight-limbed path, along with information on asanas, pranayama, the teachings of Swami Vivekenanda, and many links to teachers and other resources.
http://sameekshaa.tripod.com/yoga.html
Yoga For You
Outlines the origins of Yoga, and describes the eight parts of Astanga Yoga. Illustrations and technique for several asanas. Part of the Facets of India site.
http://www.geocities.com/dipalsarvesh/yoga.html
