Al-Islam.com Kingdom of Saudi Arabia, Ministry of Islamic Affairs, Endowments, Da‘wah and Guidance.
In Arabic, English, French, German, Malay, and Turkish.
Al-Islam.org Ahlul Bayt Digital Islamic Library Project (UK ; Qom, Iran)
A comprehensive site, with a very good subject index.
al-Khazina - The Library
Edited by Prof. Jerome W. Clinton.
Princeton University, Dept. of Near Eastern Studies
A collection of Web Sites on Islam and Islamic History used in Near East Studies courses at Princeton University.
Muslim World Music Day (ARChive of Contemporary Music, Columbia University Libraries, New York)
Since April 12, 2011, an online effort to identify and catalog all the recordings of Muslim music in the world.