The Yoga Sutras of Patanjali

Spiritual Union of Patanjali Yoga, An Insight Vision - Full text of a book by G S Virk, based on Patanjali's teachings.
The Yoga Aphorisms of Patanjali - An interpretation by W. Q. Judge, originally published in 1889, regarding the aphorisms on concentration and the essential nature of isolation. Includes the text of the aphorisms.
The Yoga Sutras of Maharshi Patanjali - An "interpretive" translation of the Sutras that strives to overcome the problem that many of the important Sanskrit words used have no English equivelent.
The Yoga Sutras of Patanjali - The Threads of Union translation by Bongiovanni. With concordances and word frequency lists.
Yoga Sutras of Patanjali - Links to the Sutras in many international languages, online discussion group regarding Patanjali and his works.
Yoga Sutras of Patanjali - Reluctant Messenger of Science and Religion version translated by Chester Messenger.
The Yoga Sutras of Patanjali: The Book of the Spiritual Man - Etext at Project Gutenberg.
The Yogadarshana - Translation, commentary, and synopsis by a Godfrey Devereux.
Levels of transformation in the Yoga Suttras of Patanjali