This joins other open access databases that were listed on this blog on 8 Nov 2011 and 10 Mar 2013.
There's not much information on the homepage:
OATD aims to be the best possible resource for finding open access graduate theses and dissertations published around the world. Metadata (information about the theses) comes from over 600 colleges, universities, and research institutions. OATD currently indexes over 1.5 million theses and dissertations.
About OATD (our FAQ).
You may also want to consult these sites to search for other theses:
- Google Scholar
- NDLTD, the Networked Digital Library of Theses and Dissertations. NDLTD provides information and a search engine for electronic theses and dissertations (ETDs), whether they are open access or not.
- Proquest Theses and Dissertations (PQDT), a database of dissertations and theses, whether they were published electronically or in print, and mostly available for purchase. Access to PQDT may be limited; consult your local library for access information.