Many of the resources on the DePaul University Library's A-Z database list contain content that is openly accessible.
Click here for a list of Open Access databases offered by DePaul Library. Each database has a brief description describing the subject area and content it contains. You may use the All Subjects drop down list to narrow by discipline.
Finding Open Access materials in DePaul's Library Search is also an option. Open materials are tagged with an orange open lock and the words OPEN ACCESS like this article:
The filters in library search will also allow you to limit your results to open access materials. Apply the Open Access filter under Availability:
OATP is a crowd-sourced project running on free software to capture new developments on open access to research.