Once installed, these extensions help you to identify free, open access (OA) versions. Often, these come from institutional repositories, such as W&M ScholarWorks. (Another reason for students and faculty to post their work there!)
While OA is a newer form of scholarly publishing (which is commonly described as starting in 2002), many OA journals comply with well-established peer-review processes and maintain high publishing standards. For more information, see Peter Suber's overview of Open Access: http://legacy.earlham.edu/~peters/fos/overview.htm.
There are many discipline-specific as well as multi-disciplinary open access journals, with some links to collections appearing below. Choose journals for publication carefully; see "Vetting OA Journals" in this guide for more information, or contact your Research Librarian for help.
Depositing your work in an open access repository is another way to share your research. Some of these sources are pre-print servers, where you can post article drafts for discussion with your peers. One recent study indicates that articles posted in biology pre-print servers are more highly cited than others. Be careful to comply with copyright and licensing restrictions when uploading your published work to one of these repositories.