Open Access (OA) - refers to free, accessible, digital, online content, like Project Gutenberg and Wikipedia.
Open Educations Resources (OER) - refers to free, open license educational materials, like textbooks or instructional videos.
For more advice and definitions about OER (Open Educational Resources), review the Creative Commons Education / OER page and Virginia Tech Libraries Open Education guide
Please explore the subpages listed in the left column under Open Access for these types of open access materials: Textbooks Online, Books + Articles, Images, Streaming Video and Other Materials
DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.