The most searched British META-OPAC. It contains the online catalogue of 22 of the largest university research libraries in the UK and Ireland, plus the British Library catalogue.
SUDOC: Système universitaire de documentation
This search engine allows you to undertake integrated catalogue searches of French University libraries and other educational institutions. It covers more than 5 million references on books, theses, journals and other types of documents.
CCFR: Le Catalogue Collectif de France
This catalogue allows you to locate and reserve more than 14 million documents stored in the main libraries of France - municipal and those associated with Universities and research centres. It includes the references of BMR (Catalogue des fonds rétroconvertis des bibliothèques municipales) - the municipal libraries - and those of BN-Opale Plus and of SUDOC.
Karlsruhe Virtueller Katalog KVK
The wonderful University of Karlsruhe Virtual Catalogue allows you to search all the major libraries and national opacs in the world at once. Indispensable.