Cornerstone: A Collection of Scholarly and Creative Works

A list of over 500 various institutions using the bepress Digital Commons® platform (which is what Library Services uses for Cornerstone).

OpenDOAR is a directory of academic open access repositories.

A digital archive for open educational resources that serves as a central repository for Minnesota State faculty and staff.

The aim of ROAR is to promote the development of open access by providing timely information about the growth and status of repositories throughout the world.

agriRxiv is a free, open access source of unpublished preprints across the agricultural sciences.

arXiv is a free distribution service and an open-access archive for 1,789,341 scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics.

bioRxiv is a free online archive and distribution service for unpublished preprints in the life sciences.

engrXiv is dedicated to the dissemination of engineering knowledge quickly and efficiently.

From the Simmons College Open Access Directory wiki, a list of subject-specific repositories.

From the Center for Open Science (COS), search and find preprints in a variety of disciplines.

Free preprint server for the psychological sciences.

PubMed Central® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).

RePEc (Research Papers in Economics) is a collaborative effort of hundreds of volunteers in 102 countries to enhance the dissemination of research in Economics and related sciences

An open archive of the social sciences, SocArXiv provides a free, non-profit, open access platform for social scientists to upload working papers, preprints, and published papers, with the option to link data and code.

SSRN is a platform for the dissemination of early-stage research, representing disciplines across the full research spectrum, including the applied sciences, health sciences, humanities, life sciences, physical sciences, and social sciences.

Preprints for the electrical engineering and compouter science communities, sponsored by IEEE.

The World Bank Open Knowledge Repository (OKR) is The World Bank’s official open access repository for its research outputs and knowledge products.