These are the directories that list OA journals:
1. Directory of Open Access Journals <https://doaj.org/>
2. Open Access Publishers Association <http://oaspa.org/>
Although publishing in an open access journal is the best way to make your research more accessible, you can still support open access while still publishing in the journal of your choice. Most journals allow authors to self-archive their work. If the journal allows you to self-archive, you may be able to post your articles on your website and into an institutional repository.
You can check the open access allowances and limitations of your journal or publisher with one of these methods:
There's a variety of Open Access journals in which you can publish your research. The OA journals vary from free, without any permissions or fee barriers, to restricted access based copyright-related issues. It is a way of publishing your work so that your students and colleagues can access it without barriers. Here are some options:
Option 1: Publish in open access journals (Gold) for a fee. These journals permit you to publish your work so it is freely available on the web. The Public Library of Science (PLOS) is an example of an Open Access publisher in the fields of science and medicine.
Option #2 Publish in journals with Open Access options and/or deposit your research in an open database repository (Green).
The purpose of repositories is to provide open access and preservation of research outputs and other materials such as learning resources and creative work.
Institutional Repository
Bronco Scholar <http://broncoscholar.library.cpp.edu/>
Cal Poly Pomona's institutional repository. This is a place to deposit your research or other creative projects for long-term access and preservation.
Disciplinary Repositories
Open Access Directory <http://oad.simmons.edu/oadwiki/Disciplinary_repositories>
This list contains all the repositories listed below. It is a wiki hosted by Simmons College. This is the most comprehensive list of Open Access repositories listed on the Web.
Science and Engineering Repositories
ArXiv <http://arxiv.org>
An open access repository for Computer Science, Physics, Mathematics, Nonlinear Sciences, Quantitative Biology, and Statistics.
Citseer <http://citeseerx.ist.psu.edu/index;jsessionid=B921AFC1DE607EC545A6ACB25848137B>
Focused on computer and information science, Citseer is a search engine for research papers on the Web, but is also a repository that accepts submissions.
Cogprints <http://cogprints.org/>
Accepts self-archived papers in any area of Psychology, Neuroscience, and Linguistics, many areas of Computer Science, Philosophy, Biology, Medicine, Anthropology, and other sciences related to the study of cognition.
Social Science Repositories
RePEC <http://repec.org/>
Repository for research in economics and related sciences. Can deposit working papers, journal articles, books, book chapters and software components.
Cogprints <http://cogprints.org/>
Accepts self-archived papers in any area of Psychology, Neuroscience, and Linguistics, many areas of Computer Science, Philosophy, Biology, Medicine, Anthropology, and other sciences related to the study of cognition.