World
British Library e-theses online service (EThOS)
Registration required to download theses.
Hong Kong University Theses Online
Primarily English, but some Chinese only theses.
Networked Digital Library of Theses & Dissertations (NDLTD)
International, full-text theses from participating collections around the world.
Open Dissertations (Open Access)
A collaboration between EBSCO and BiblioLabs, this connects you to Open Access Doctoral EDTs (Electronic Theses and Dissertations) accepted by American Universities from 1955 onwards in selected full-text.
WorldCat
Useful for identifying theses held in North American libraries (Select 'Advanced Search' then 'Content' and 'Thesis/dissertations').
Europe
Bibliothèque nationale de France (BnF)
Localiser une thèse à la BnF.
DART-Europe
E-theses portal providing access to theses from European universities in 28 countries.
Theses.fr
Moteur de recherche de thèses de doctorat françaises soutenues depuis 2006.