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.
United States Canada Search or Browse for Repositories FAQ
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.
Search Google Custom Search Help (WIKI)