Arabic-English dictionary of Qur'anic usage is a comprehensive and contextualized Arabic-English dictionary of Quranic usage based on classical Arabic dictionaries and Quran commentaries.
Encyclopedia of Arabic Language and Linguistics is an interdisciplinary research tool covering all aspects of Arabic languages and linguistics. It is full-text searchable and has a browsable index.
Encyclopaedia Islamica is based on the abridged translation of Dāʾirat al-Maʿārif-i Buzurg-i Islāmī', one of the most comprehensive research tools on Islam and the Muslim World. Encyclopedia Islamica is particularly relevant for Shi'i studies.
Encyclopedia of Islam (2nd edition) is a unique and invaluable reference tool setting out the present state of knowledge of the Muslim World.
Encyclopaedia of Islam (3rd edition) is an entirely new work reflecting the great diversity of current scholarship on the Muslim World, including Islam in the 20th century and Muslim minorities all over the world.
Encyclopaedia Iranica is a comprehensive research tool focusing on the study of the Iranian civilization in the Middle East, the Caucasus, Central Asia, and the Indian subcontinent.
Encyclopedia of Women & Islamic Cultures (EWIC) is an interdisciplinary, trans-historical, and global research tool aiming to cover any topic relating to women and Islamic cultures in every region where there have been significant Muslim populations.
Index Islamicus is an international classified bibliography of publications in European languages on Islam and the Muslim World.
Oxford Islamic studies online is a comprehensive research tool providing reliable background information on Islam and the Islamic World.
The Oxford encyclopedia of philosophy, science, and technology in Islam is an authoritative research tool giving access to more than 250 A-Z providing scholarly overviews of the thinkers, movements, instruments, theories, institutions, processes, events, and historical developments related to Islamic classical history and the contemporary quest for knowledge.
World Biographical Information System (WBIS) is a very comprehensive biographical database referencing over 6 million people from the 8th century to the present day. WBIS also includes 8.5 million digital facsimile articles from biographical works.