Learning Resource Center (LRC)

A leading directory that indexes and provides access to high-quality, peer-reviewed, open access scholarly journals from around the world. Covering a wide range of academic disciplines including science, medicine, social sciences, arts, and humanities, DOAJ ensures all its content is free to read, download, and share—making it ideal for students, educators, and researchers.  

A free web-based search engine that indexes scholarly literature across various formats and disciplines. Users can search for academic journal articles, theses, books, conference papers, court opinions, and patents. Although not all materials are freely accessible, it often links to full-text open access versions when available. 

CORE aggregates millions of open access research papers from thousands of repositories and journals worldwide. It offers a powerful search engine that helps users discover full-text scholarly content across multiple subjects, making it a valuable resource for academic research and literature review. 

A global union catalog developed by OCLC that provides access to millions of digital resources. OAIster indexes open access materials such as e-books, articles, multimedia, and digital theses, contributed by libraries and repositories worldwide, and is accessible through WorldCat.org. 

is a trusted online platform that provides free, full-text access to thousands of academic, peer-reviewed books from leading publishers across the globe. Covering a wide range of disciplines—including the humanities, social sciences, natural sciences, law, and technology—DOAB aims to increase the discoverability and accessibility of high-quality academic content.