Open access aims to immediate and unrestricted access to scholarly literature over the Internet. It offers numerous advantages for the research community, such as equity in access, increasing research visibility for authors and organizations, impact and citations publications, etc. Open access publishing is available in various modes, Viz gold OA, Green OA, Bronze OA, Diamond OA, without compromising the quality of the editorial process. Several global initiatives are attempting to aggregate OA content into a single platform to increase discoverability. Following are a few popular platforms that can retrieve OA content.

  1. DOAJ: Directory of Open Access Journals aggregate quality gold OA journals and provides access to millions of scholarly publications with robust search and browse functionalities.
  2. DOAB: Directory of Open Access Book is a community-driven discovery service that indexes and provides access to scholarly, peer-reviewed open access books and helps users find trusted open access book publishers.
  3. ROARRegistry of Open Access Repositories is a directory of open access digital repositories of academic and research institutes.
  4. CORE: is an open access scholarly literature aggregator, provide access to more than 200 million documents