Bismillah ar-Rahman ar-Rahim
The following is a list of sites that have uploaded books in different forms. Some of them hold large collections of manuscripts. These book links were provided by Shaykh Muhammad Chothia.
PDF Book Sites:
http://majles.alukah.net/showthread.php?p=245122 (go to top of page)
In the following link you’ll have to sign up first. It’s awesome:
Old Rare Prints of Books:
Mixed PDF, DOC :
Shamilah (Massive Program of Open-Source Books):
Wa billah at- tawfiq.