Internet Archive is a digital library for free & borrowable texts, movies, music & wayback machine.

JSTOR is a digital library for academic research and primary sources.

Scribd is a digital library service offering access to over 200M documents, ebooks, audiobooks, and presentations via subscription.

Project Gutenberg is a library of over 75,000 free eBooks, offering public domain literature in epub and Kindle formats for download or online reading.

Open Library is an open, editable digital library catalog offering free access to borrow and read millions of books online through controlled digital lending.

HathiTrust Digital Library is the best digital library for public domain works and is used by scholars and researchers worldwide.

Marxists Internet Archive is a digital library for Marxism and is used by researchers and scholars.

Érudit is an open-access digital platform providing scholarly documents in social sciences and humanities, including journals, books, and theses.

hoopla is a digital media service partnering with public libraries to offer free streaming and downloaded audiobooks, ebooks, movies, and comics to cardholders.

Libby is the award-winning app by OverDrive that lets users borrow millions of free ebooks and audiobooks instantly using their public library card.

SciELO Mexico is an open-access digital library providing full-text academic journals from Mexico, supported by UNAM.

Thai Journals Online (ThaiJO) is Thailand's central electronic journal database system, aggregating academic journals across all disciplines developed on the OJS platform.

SciTePress is a digital library for science and technology publications.

Julkari is the open publication archive for the Finnish Ministry of Social Affairs and Health, providing free access to health and social research reports.

E-Periodica offers online access to digitized Swiss journals and periodicals, a service provided by ETH Library, covering history, science, and culture.

ITHAKA is a nonprofit organization dedicated to improving access to knowledge, making higher education more affordable, and preserving digital scholarship for the future.

Virtual Library archiving over 20,000 articles in Spanish and English on history, science, politics, myths, and alternative knowledge.

Numdam is a digital library specializing in providing access to the full text of mathematical research documents, including journal articles, conference proceedings, books, monographs, and doctoral theses.

The Wayback Machine is an archive service by the Internet Archive for searching the history of over 1 trillion web pages and digital artifacts.

Sora is a dedicated reading app for students, powered by OverDrive, providing easy access to digital library content for K-12 education.

BiblioScout is an online scholarly eLibrary platform providing access to academic books, journals, and textbooks across humanities, law, medicine, and pharmacy.

NetLibrary is a digital library services company that focuses on providing online database access and information retrieval.

Ukrlib is a Ukrainian digital library providing free access to a vast collection of Ukrainian literature, poetry, and educational resources online.

Web-Archiv is a digital knowledge archive for various topics and is used by individuals seeking information.