1. CORE:
CORE is an open access research database with a collection of multidisciplinary articles. The users can search more than 66 million articles without a subscription fee. CORE provides links of the original publisher’s site for full-text article and hosts around 5 million records by itself. Along with the keyword search, CORE provides advanced search options to reach the desired articles by publication type, year, language, journal, and authors’ name.
2. ScienceOpen:
It is a research and publishing network that provide access to articles related to all areas of science. It contains 28 million articles that are easily accessible. Although to see the full article registration is needed but it is free of cost. Its advanced search options made it much easier and simple to look for the desired material. This company was founded in 2013 and its’ main aim is to ease open communication between public and academics and judge the ideas of every individual on their merits.
3. Directory of Open Access Journals:
The Directory of Open Access Journals (DOAJ) is a multidisciplinary research platform which offers its researchers access to high-quality journals. Its repositories have more than two million articles from 9,519 journals that you can search either by entering the subject or keywords. This site was started in 2003 with a focus on increasing the visibility of online scholarly journals. You can find material related to almost every subject from science to law to history and fine arts and everything in between.
4. Social Science Research Network:
The Social Science Research Network (SSRN) facilitates the social sciences community through its collection of papers on social sciences. This site provides more than 700,000 abstracts and around 600,000 full-text papers. You need to become a member of the community to use the services but there is no registration fee so you can easily interact with scholars from around the globe. It does not contain any specified search options for full-text articles but as most of the journal can be accessed without any fee you will not encounter any problem.
5. Education Resources Information Center:
The Education Resources Information Center (ERIC) is a free online source for material related to the field of education. It links you to other sites where the information may charge a subscription fee but you can only search the full-text articles. The sources include the indexes journals, technical reports, government documents and books. A formal review process is carried out of all the sources of material before indexing.
6. Public Library of Science:
Public Library of Science (PLOS) is a renowned free online source for the open access material related to science. The site offers openness in academic research and is committed to provide best services to its users. It is a nonprofit organization that aims to provide highest possible level of open access to the science articles immediately and free of cost.
7. OpenDOAR:
OpenDOAR, or the Directory of Open Access Repositories, is a resource of open access articles that offers relevant researches in all disciplines. You can easily open the repositories by using the Google Custom Search. To ensure the quality of the material these repositories are accessed and categorized by OpenDOAR staff.
8. Digital Library of the Commons Repository:
The Digital Library of the Commons (DLC) Repository is a multidisciplinary journal repository that provides its users the opportunities to run through thousands of free and open access journals from around the globe. It is run by Indiana University.
9. Bielefeld Academic Search Engine:
The Bielefeld Academic Search Engine (BASE) is run by the Bielefeld University Library in Germany. It has more than 4,000 sources that provide more than 100 million documents. Open access is granted to about sixty percent of its material.
10. Paperity:
This site is also a multidisciplinary repository of open access journals. Its main concern is to help the individuals to avoid paywalls while searching for some authentic and scholarly material. This site also helps the authors to connect with their audiences and share their ideas with them to boost readership.
