An authoritative directory of academic open access repositories.

OAIster is a union catalog of millions of records representing open access resources that was built by harvesting from open access collections worldwide using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). Today, OAIster includes more than 30 million records representing digital resources from more than 1,500 contributors.

free, open access repository of full-text scholarly literature in agricultural and applied economics, including:

Working papers
Conference papers
Journal articles

is a nonprofit open access scientific publishing project aimed at creating a library of open access journals and other scientific literature under an open content license.

Directory of Open Access Journals is a service that provides access to quality controlled Open Access Journals.

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An image resource for the educational community.