Manuscript Links.

Individual Libraries: Europe.

• Bern. Burgerbibliothek.
• Bologna. Biblioteca Universitaria.
• Bruxelles. Bibliothèque royale de Belgique. | Belgica digitized manuscripts.
• Cambridge.
  • Corpus Christi College. Parker Library on the Web | Parker Library blog.
  • Fitzwilliam Museum.
  • St. John's College. Catalogue.
  • Sidney Sussex College.
  • Trinity College. Early manuscripts and James catalogue.
• Firenze. 
  • Biblioteca Medicea-Laurenziana.
  • Biblioteca Riccardiana.
• Graz. Universitätsbibliothek.
• Heidelberg. Universitätsbibliothek.
• Klosterneuburg, Stiftsbibliothek
• København. Kongelige Bibliotek.
• Köln. Dombibliothek. Codices electronici ecclesiae coloniensis.
• Leiden. Universiteitsbibliotheek. Digitized manuscripts.
• London. British Library | Catalogue | Reproductions | Digitized manuscripts.
• Lund. University Library.
• Manchester. John Rylands University Library. Digitized manuscripts (mainly Middle English).
• Milano. Biblioteca Ambrosiana.
• München.
  • Bayerische Staatsbibliothek. Online catalogue | Bibliography.
  • Universitätsbibliothek. Keimelion digitized manuscripts.
• Olomouc. Research Library. Digitized manuscripts.
• Oslo. Schøyen Collection
• Oxford
  • Bodleian Library. Special Collections & Western MSS | Reproductions.
  • Merton College.
  • Queen's College. Catalogue.
  • Early Manuscripts at Oxford University (Full scans of select MSS from Bodleian, Balliol, Corpus, Jesus, Magdalen, Merton, St. John's: many are missing folios).
• Paris. Bibliothèque nationale de France. | Gallica | Reproductions
• Roma. Biblioteca Angelica
• Salzburg. Universitätsbibliothek. Online manuscript fragments.
• Sankt Gallen. Stiftsbibliothek. Codices Electronici Sangallenses.
• Valenciennes. Bibliothèque Municipale | On-line microfilm collection.
• Vatican. Biblioteca Apostolica Vaticana | Digitalized MSS.
• Venezia. Biblioteca Marciana.
• Wien. Österreichische Nationalbibliothek.
• Wolfenbüttel. Herzog August Bibliothek.

Individual Libraries: United States.

• Austin. Harry Ransom Center, University of Texas.
• Baltimore. Walters Art Museum. Digitized Walters Manuscripts.
• Bloomington. Lilly Library.
• Bryn Mawr. Bryn Mawr College. Catalogue.
• Burlington. University of Vermont. Medieval and Renaissance Manuscripts.
• Cambridge. Houghton Library, Harvard University. Digital Manuscript Collection.
• Charlottesville. University of Virginia.
• Eugene. University of Oregon. Burgess collection.
• Hanover. Rauner Special Collections Library, Dartmouth College. Western Manuscripts.
• Ithaca. Cornell University.
• Lexington. University of Kentucky. Scanned slide images.
• Los Angeles. J. Paul Getty Museum. Online manuscript images.
• New Haven. Beinecke Library, Yale University. List of MSS.
• New York.
  • Morgan Library. Corsair image resource.
  • New York Public Library. Digital Gallery.
• Notre Dame. University of Notre Dame.
• Philadelphia. Free Library
• Princeton. Princeton University Library.
• San Marino. Huntington Library. Online version of Dutschke catalogue with image links.

Larger Areas or Multiple Libraries.

• Germany.
  • Manuscripta Mediaevalia.
• Italy.
  • BibMan. (Bibliography on MSS preserved in Italy).
  • Manoscritti datati d'Italia.
  • Manus. Censimento dei manoscritti delle biblioteche italiane.
• Netherlands
  • Medieval Manuscripts in Dutch Collections.
• Switzerland
  • e-codices. Virtual Manuscript Library of Switzerland.
• United States.
  • Digital Scriptorium.
  • (South Carolina) Pages from the Past.

Microfilm and Other Collections.

• Hill Museum and Manuscript Library
• Institut de Recherche et d'Histoire des Textes (IRHT)
• Saint Louis University. Knights of Columbus Vatican Film Library.
• Ohio State University. Center for Epigraphical and Palaeographical Studies.

Collectors and Provenance.

• Europeana Regia (Bibliotheca Carolina, Library of Charles V, Library of Aragonese Kings of Naples).
• Ege-related.
  • Otto F. Ege Paleography Portfolio.
  • Scattered Leaves/Remaking the Book.
  • Otto F. Ege Collection, Denison University.
• Provenance marks.
• Schoenberg Database.

Dealers and Auction Houses.

• Christie's.
• Krown and Spellman.
• Les Enlumineurs.
• Mackus.
• Maggs Bros.
• Philadelphia Rare Book Company.
• Phillip J. Pirages.
• Quaritch.
• Sotheby's.

Author Handlists.

• Orosius.

Journals.

• Scriptorium. Website of the journal with searchable indexes.

Blogs.

• British Library Medieval Manuscripts blog.
• Manuscript Road Trip (Lisa Fagin Davis).
• medievalfragments (Turning Over a New Leaf Project, Leiden).

Tools and Reference Works.

• Cappelli, Dizionario di abbreviature (not very easy to use in this format.)
• In principio (Brepolis). Database of incipits. (Subscription only)
• P.O. Kristeller/S. Krämer, Latin Manuscript Books before 1600 (5th, online edition).
• P.O. Kristeller, Iter Italicum.
• Franz Steffens, Paléographie Latine.

Palaeography Tutorials

• Thomas Frenz, Paläographisches Lesetraining.

Miscellaneous (mostly bibliography).

• Catalogue of Digitized Medieval Manuscripts. UCLA (Ceased updating 2013).
• Intute. Links and reviews for manuscript sites. (Ceased updating July 2011).
• Peraldus. Bibliography. ("Inactive for several years" in Feb. 2009).