Yoga Dex http://www.yogadex.org/
List of Yoga teachers in the United States, Canada, Netherlands, Great Britain,and India and their class schedules. Provides free listing to Yoga teachers.
Yoga Shakti Mission http://www.yogashakti.org/
Teaching classes in hatha yoga, meditation, scriptural studies, satsang, and religious functions. Ashrams in New York and Florida, India, mission in London.
YogaFinder http://www.yogafinder.com/
Directory of yoga instructors and facilities around the world. Organized by location, can also search for instructor or facility by name.
Australia