Translations of the Yoga-sutra-s:

• The Yoga-System of Patanjali, translated by James Haughton Woods.
• The Yoga Sutras, translated by Trevor Leggett.
• The Yoga-sutra of Patanjali: Sanskrit-English Translation and Glossary, by Chip Hartranft. (pdf file)
• The Yoga Sutras of Patanjali, translated by Gabriel Pradipaka (& Andres Muni) at http://www.sanskrit-sancrito.com.
• The Yoga Sutras of Patanjali, translated by Swami Jnaneshvara.
• The Yoga Sutras of Patanjali, translated by BonGiovanni. (pdf file)

The Yoga-sutra-s translated with commentary:

• The Light of the Soul, The Yoga-sutras of Patanjali, paraphrased by Djwhal Khul, with commentary by Alice Bailey. Zipfile - Download
• The Yoga-System of Patanjali, translated by James Haughton Woods. Flipping book at Archive.org. Flipping book at Google.com.
• Enlightened Living: The Yoga Sutra of Patanjali, translated by Swami Venkatesananda. (pdf file)

The Yoga-sutra-s:   Audio

• The Yoga Sutras, first 11 verses chanted by Vyaas Houston. (mp3).
• The Yoga Sutras, first 29 verses chanted by Christopher Wallis. (mp3)
• The Yoga Sutras of Patanjali, translated by Mark Giubarelli. (Online Sanskrit transliteration, translation, and mp3 audio clips). Zipfile - Download

The Yoga-sutra-s in Sanskrit

• The Yoga-sutra-s. Devanagari. (pdf file)

The Yoga-sutra-s:   Articles Online

• "Sanskrit and the Yoga Sutras," by Vyaas Houston.
• "Sanskrit, the Language of Meditation," by Vyaas Houston.
• "The Yoga Sutras of Patanjali: Installing a New Operating System. Part 1," by Vyaas Houston. Parts 2 and 3. (pdf files)