Q. Open Access Resources - Non UMD Affiliation

Below is a list of Open Access resources available to users with no UMD affiliation:

Google Scholar - scholar.google.com
Searches academic publishers, professional societies, pre-print archives, and university institutional repositories. Note: Users can search and discover resources, but access to the full-text is limited. Only open access materials can be accessed

Directory of Open Access Journals (DOAJ) https://doaj.org/ 
DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals. DOAJ is independent. All funding is via donations, 22% of which comes from sponsors and 78% from members and publisher members. All DOAJ services are free of charge including being indexed in DOAJ. All data is freely available.

Directory of Open Access Books (DOAB) https://www.doabooks.org/
Service of DOAB Foundation. DOAB Foundation is a non-profit legal entity under Dutch law (‘stichting’), established by OAPEN Foundation and OpenEdition. The Foundation is based at the National Library in The Hague. The primary aim of DOAB is to increase discoverability of Open Access books.

Open Access databases in Database Finder https://www.lib.umd.edu/dbfinder
Click on the Open Access link. Content in those databases is open access, no authentication needed. Currently there are seven databases listed (as of July 10, 2020), but the list will probably grow.

Public Libraries
Please also check with your local Public Library for access to resources using your public library card. 
In addition, residents of the state of Maryland can access the electronic sources from Enoch Pratt including databases.