While you may not be able to access the full text of all articles, it is free to search these databases. Open Access materials will be available to all users and publishers occasionally make select articles available for free. Creating an account allows you to set up alerts when new work is published on the topic.
"Open access (OA) literature is digital, online, free of charge, and free of most copyright and licensing restrictions."
--From Open Access by Peter Suber.
Open Access articles, journals, and ebooks are available to everyone free of charge. There are a few tools that can help you find these resources, as well as other articles that you find in databases: