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1. Library Genesis (LibGen): Provides a wide range of academic literature, including books, articles, and journals.
2. Z-Library: A digital library that offers free downloads of millions of books.
3. FreeFullPDF: Provides freely downloadable full-text PDF versions of academic papers.
4. BookSC: Centralized platform for downloading books across various disciplines.
5. OpenAIRE: A European infrastructure that promotes open access to research outputs and data.
6. CORE (COnnecting REpositories): Aggregates global open access research literature resources.
7. DOAJ (Directory of Open Access Journals): Provides a directory of open-access journals, ensuring they meet high-quality standards.
8. PubMed Central (PMC): Offers free access to open-access literature in the life sciences and medical fields.
9. Bielefeld Academic Search Engine (BASE): A German open-access academic search engine.
10. Internet Archive: Provides digitized books, music, movies, and other document resources, sometimes including academic literature. | 
