Online

Aristoteles Graecus
http://beta.teuchos.uni-hamburg.de/TeuchosWebUI/manuscripts/search-manuscripts

Cesena, Biblioteca Malatestiana
http://www.malatestiana.it/manoscritti/manoscritti.htm

Digital Scriptorium: Census of Greek Medieval and Renaissance Manuscripts in the Collections of the USA
http://scriptorium.columbia.edu/greekmss/

Directory of Institutions in the United States and Canada
with Pre-1600 Manuscript Holdings (by M. Conway and L. Fagin Davis)
http://www.bibsocamer.org/BibSite/Conway-Davis/Pre-1600.Mss.Holdings.pdf

Greek Medical Manuscripts: A Database of the Manuscripts in Diels’ Catalogue
(1905-1908)
http://medicaltraditions.org/collection/databases/greek

Inventaire des manuscrits grecs conservés en Suisse
Verzeichnis der griechischen Handschriften der Schweiz
http://www.codices.ch/graeca/codices.html

London, Lambeth Palace Library
http://hellenic-institute.uk/research/lpl/Greek-MSS/Catalogue/Development/Master.pdf

Manus online. Censimento dei manoscritti delle biblioteche italiane
http://manus.iccu.sbn.it//index.php

Manuscripta Mediaevalia
http://www.manuscripta-mediaevalia.de/area/3/Handschriftenkataloge.html

NBM. Nuova Biblioteca Manoscritta. Catalogue of the manuscripts
in the libraries of Veneto
http://www.nuovabibliotecamanoscritta.it/index.html?language=EN

Oxford, Bodleian Library
http://www.bodley.ox.ac.uk/dept/scwmss/wmss/online/medieval/

Rinascimento virtuale
http://palin.iccu.sbn.it/liste.aspx?lang=it-IT