Library of Congress
Loc: Ancient Manuscripts: From the Desert Libraries of Timbuktu
This is a collection of primary, historical documents from Timbuktu, Mali during the the 16th through 18th century. The documents cover all aspects of this advanced African civilization.
University of Georgia
University of Georgia: Sufism, Sufis, and Sufi Orders: Sufism's Many Paths
Extremely in-depth essay about Sufism, which "is generally understood by scholars and Sufis to be the inner, mystical, or psycho-spiritual dimension of Islam." Discusses "Sufism in the West," "Sufi Women," "Sufi Qur'an Commentary," and...
Carnegie Endowment for International Peace
Carnegie Endowment for International Peace: Sufism in Central Asia [Pdf]
A paper in which the author discusses the role of the Islamic mysticism in states in central Asia, especially Uzbekistan.
Other
Sufism/sufi Order International
An interfaith definition of Sufism, expanding the definition beyond religion. Part of a broader site.