Introduction to Sufism by Dr. Qadeer Shah Baig - short and readable intro

SUFI TRADITIONS- by Zos Imos - a brief summary of Sufi theology and practice - excellent

Sufism, Sufis, and Sufi Orders: Sufism's Many Paths - By Prof. Alan Godlas - excellent intro - heaps of links too!

  Human development (Sufism) - quite a good general intro

Sufism / Islamic Mysticism
biographies and short on-line exerpts - at the Mysticism in World Religions page

  ISLAMIC WISDOM - at the Ancient Wisdom home page - some material on-line

  Ni`matullahi-Safi 'Ali Shahi Sufi Order- Includes the online essay - A Short Introduction to the Life and Works of Safi `Ali Shah:  A Persian Sufi Saint of the 19th Century by Nima Hazini

  The Nimatullahi Sufi Order - useful material on Sufism and the Nim`atullahi order
"The sufi is one who moves towards the Truth by means of Love and devotion. Since only one who is perfect is capable of realizing the Truth, the sufi strives his utmost for Perfection...The Nimatullahi Sufi Order is one of the authentic Sufi Orders active in the modern day. The present Master of the Nimatullahi Order is Dr. Javad Nurbakhsh."

Writings of Pir-O-Murshid Inayat Khan - the complete works of the Indian Sufi teacher and musician, Hazrat Inayat Khan, online.  A great populariser of Sufism to the West in the early 20th century, he presents his message in a non-technical and accessable manner, unlike many other esotericists and orientalists (e.g. Blavatsky).

  Bismillah : Sufi Pir Baba Sultan - about Baba Sultan, a sheikh of the the Sufi Silsila (Line) of Qalandars, known as the Silsila Qalandariya.

Triangle Sufi Center International Sufi Movement, America - Home to the Universal Sufism of Hazrat Inayat Khan
"The Triangle Sufi Center is associated with the International Sufi Movement founded by Hazrat Inayat Khan. The goal of the Triangle Sufi Center is to share the ideas and experiences of Universal Sufism to those in the local (North Carolina Triangle) and Internet communities. Sufism, the religion of the heart, employs universal mysticism to experience directly, the God within and the God without."

Serving the Guest
"is a cookbook with essays and anecdotes on the historic and contemporary role of food, eating, meals and hospitality in Sufism and Islam, and includes 175 recipes for for everyday and feast-day eating. The site also features an extensive gallery of art of the Muslim world.
An added feature is the inclusion in the book of Peter Lamborn Wilson's article on Abu Bushaq At'imah from his long out-of-print book, Kings of Love; and other items of interest to those who enjoy his work, such as recipes for bhang and majoun."