The Arabic Papyrology Database allows you to search Arabic documents on papyrus, parchment and paper from the 7th up the 16th century A.D. – there are now 414 (out of ca. 2,000) at your disposal. Use this database to locate relevant historical data, investigate linguistic peculiarities, find references and more. [The APD is for] papyrologists, historians, philologists, editors, professors, students: Specialists in Arabic studies, Islamic studies, history of the Middle East upt to the 10th/16th c., Islamic law, linguisits, historians in general – just anyone dealing with Arabic documents. Try it out!
Firefox only, so far; sorry, IE users. (Via wood s lot.)