Digivatlib is the Vatican Library's repository for digitized manuscripts, and includes 100 Ottoman manuscripts.
Hakkı Tarık Us Collection is a digital archive of Ottoman periodicals available at the Beyazit State Library.
IRCICA: Farabi Digital Library includes digital Salname's: Ottoman Yearbooks, and a collection of official Ottoman State Yearbooks (Salname). Note that registration is required to access some features.