For information about searching for & using open content see the International Open Educational Resources (OER) Toolkits and guide list.
Unpaywall and Core Discovery are browser extensions for Firefox and Chrome. They add a green tab beside free to read research articles.
The Open Access Button will search across the web for a freely accessible full-text version of an article and if not found will send an email to the author asking them to provide a copy
OASIS Open access search will search across 113 different sources. Search widget code at https://oasis.geneseo.edu/about.php
Mason OER metafinder searches 23 sources, including HathiTrust, Internet Archive, Project Gutenberg, and the Digital Public Library of America.)
DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.
For a list of Open Access Journals with an Australian publisher view here
The OAPEN Library is a central repository for hosting OA books.
The Directory of Open Access Books is a discovery service for OA books.
OpenDOAR is an authoritative directory of academic open access repositories.
A Guide to Making Open Textbooks with Students (Rebus Community)
Open Pedagogy Approaches: Faculty, Library, and Student Collaborations (Milne Library)
Open Pedagogy: Learn, Create, Share (Idaho State University)
Open Pedagogy in the Trades (BCcampus)
UN Sustainable Development Goals Open Pedagogy Fellowship (Montgomery College)