Gateways and Repository Searching Tools

www.openj-gate.com

From their page.

Open J-Gate is an electronic gateway to global journal literature in open access domain. Launched in 2006, Open J-Gate is the contribution of Informatics (India) Ltd to promote OAI. Open J-Gate provides seamless access to millions of journal articles available online. Open J-Gate is also a database of journal literature, indexed from 3000+ open access journals, with links to full text at Publisher sites.

If you're looking for open archives / repositories, try OAIster http://oaister.umdl.umich.edu/o/oaister/ OAIster provides links to 475 repositories, as well as a search tool. Not all materials are freely available, but a great many are.

There is a list of open access collections - and a link to free MARC records for these collections, thanks to Simon Fraser University Library at http://www.eln.bc.ca/view.php?id=1129

If you're looking for open access journals, the best starting point is the Directory of Open Access Journals at http://www.doaj.org/

Global Development Network (GDN) - Publicly accessible free online

journals

http://www.gdnet.org/online_services/journals/public_access/index.html#free

The GDN Knowledge Base is a comprehensive portal to development

research on the internet produced in developing countries

http://www.gdnet.org/knowledge_base/research_papers