Open access is a movement that seeks to make scholarly resources freely available, without subscription charges to the end user. Some journals are open access in their entirety. Other journals make selected content available as open access or open older content after an embargo period.
Open Access Tools
As you search for articles online, you'll frequently encounter site that charge users to view articles. Sometimes, those articles are also available in other locations for free. Two browser extensions are available to help you find the open access versions of online articles.