ROAR & DOAR: Registry / Directory of Open Access Respositories

  I started to look for open access repositories and was getting absolutely overwhelmed until I discovered ROAR and DOAR.
See also eScholarship Respository (California Digital Library)

Directory of Open Access Repositories - OpenDOAR
OpenDOAR is an authoritative directory of academic open access repositories. Each OpenDOAR repository has been visited by project staff to check the information that is recorded here. This in-depth approach does not rely on automated analysis and gives a quality-controlled list of repositories.
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Example: Health and Medicine/English/Multimedia

Registry of Open Access Repositories (ROAR)
We are promoting open access to the research literature pre- and post-peer-review through author self-archiving in institutional eprint archives. Open access to research maximises research access and thereby also research impact, making research more productive and effective.
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