This page was inspired by the Information Resources in the Humanities textbook I used during my MLIS. Although the book was so new that we were a week behind just waiting for the hardcover edition to come out, the paltry Open Access resources were already out of date. This website is a proof-of-concept that OA resources can be robust with a minimum of curation, as long as they are not held down in print formats where URLs decay quickly. Lists like this can be particularly useful with the wide support of librarians, educators, and archivists submitting the resources they turn to on a regular basis.
You can add to this list by using this Google Form: https://goo.gl/forms/QGIkvAELn2VBdY4x1
Also check out the General Open Access Resources page.