links:

Medieval manuscripts online

• Early manuscripts at Oxford University
• Manuscripts at the Royal Library of Copenhagen
• Saga manuscripts
• Manuscripts from Dombibliothek Köln
• Runic Inscriptions from Bryggen, Bergen

Texts online

• Diplomatarium Norwegicum
• Diplomatarium Danicum
• Diplomatarium Suecanum
• Medieval Nordic Text Archive - Menota
• Decretum Gratiani

• Saxo Grammaticus, Gesta Danorum
• Latin texts links (Forum Romanum)
• Intratext Bibliotheca Latina
• Biblia vulgata
• Source collection of the Austrian Academy
• The online medieval and classical library
  (online texts in English translation)
  

Bibliographies

• Medioevo latino
• International Medieval Bibliography (Leeds)

Publishing houses/text collections

• Museum Tusculanum Press
• Monumenta Germaniae Historica
• SISMEL
• Brepols

Collections of Links

• Netserf
• Internet Medieval Sourcebook
• Labyrinth (Georgetown, rich text collections, links etc.)
• Deutsche Medievistenverband
• Mediaevum (German gateway)
• Reti medievali (Italian Gateway)
• Co-operative for the Advancement of Research through a Medieval European Network(CARMEN)