National Digital Library of India (NDLI)National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community.
Directory of Open Access Books DOAB is a community-driven discovery service that indexes and provides access to scholarly, peer-reviewed open access books and helps users to find trusted open access book publishers.
MIT Press Open MIT Press is one of the largest and most distinguished university presses in the world and a leading publisher of books and journals at the intersection of science, technology, art, social science, and design.
Directory of Open Access Journals DOAJ is a database that contains open access articles and allows researchers to find and use published articles for their own research.
CORE Connecting Repositories is a service provided by the Knowledge Media Institute based at The Open University, United Kingdom.
Bielefeld Academic Search Engine BASE is a multi-disciplinary search engine to scholarly internet resources, created by Bielefeld University Library in Bielefeld, Germany.
CiteSeerXCiteSeerX is a public search engine and digital library for scientific and academic papers, primarily in the fields of computer and information science.
GoTripleThe single access point to discover and reuse open scholarly Social Sciences and Humanities resources and find peers.
Semantic Scholar Semantic Scholar is an artificial-intelligence backed search engine for academic publications.
ScienceOpenScienceOpen is freely accessible for all and offers hosting and promotional services within the platform for publishers and institutes.
OA.mg OA.mg is a search engine for academic papers.