This guide lists directories and websites which give access to a wealth of freely available, high quality, online resources.
Open Access (OA) resources are free of most copyright and licensing restrictions. OA research articles therefore, unlike those in conventional subscription journals, are free at the point of use to anyone with an internet connection without the need for any institutional login IDs and passwords.
BASE (Bielefeld Academic Search Engine) provides more than 60 million documents from more than 3,000 sources. You can access the full texts of about 70% of the indexed documents.