Sufi Orders and Their Shaykhs
- An annotated and explanatory listing of resources in Sufi Orders [Dr Godlas, of the University of Georgia, US]
- http://www.uga.edu/islam/sufismorders.html

Western Sufism and Traditionalism
- A paper by Mark Sedgwick gives an account of the arrival and development of Sufism in the West, and discusses the relationship of some groups to Guénon's Traditionalism (which suggested all world religions were expressions of one original "perennia
- http://www.aucegypt.edu/faculty/sedgwick/trad/write/WSuf.htm

Islamic Mysticism (Sufism)
- A schematic overview of Sufi traditions, with a collection of articles on the principal lineages.
- http://philtar.ucsm.ac.uk/encyclopedia/islam/sufi/

Tariqah
- Hyperlinked article explaining the concept and organization of Sufi Orders. [Wikipedia]
- http://en.wikipedia.org/wiki/Tariqa