Online Services
- Anwendergemeinschaft HANS (Community of Manuscript Departments in German Libraries)
- https://fachwelt.sub.uni-hamburg.de/allegro-hans.html
- Archivportal-D (Archives Portal Germany)
- https://www.archivportal-d.de
- Archivportal Europa (Archives Portal Europe)
- http://www.archivesportaleurope.net
- Consortium of European Research Libraries, Portal (CERL)
- http://www.cerl.org/resources/cerl_portal
- Koop-Litera International
- http://www.onb.ac.at/koop-litera/
- Répertoire International des Sources Musicales (RISM)
- https://opac.rism.info
- Social Networks and Archival Context (SNAC)
- http://socialarchive.iath.virginia.edu
- Zentrale Datenbank Nachlässe (Registry of Personal Paper Collections in Archives in Germany)
- http://www.nachlassdatenbank.de