This is a good collection of e-knowledge resources containing free encyclopedia, free e-books and digital libraries. Here you can quench your thirst for knowledge: you can refer to an encyclopedia such as Wikipedia, the Encyclopedia of Life and Medpedia, you can read classic literature, you can find a lot of science and technology books.
Wikipedia is a free, multilingual, open content encyclopedia project operated by the United States-based non-profit Wikimedia Foundation. Its name is a portmanteau of the words wiki (a technology for creating collaborative websites) and encyclopedia.
The Internet Encyclopedia of Philosophy (IEP), founded in 1995 as a non-profit organization, provides open access to detailed, scholarly information on key topics and philosophers in all areas of philosophy.
The Encyclopedia of Life (EOL) is a collaborative project to organize and make available via the Internet virtually all information about life present on Earth. The EOL staff is made up of scientists and non-scientists working from museums and research institutions around the world.
WikiArt is an online, user-editable visual art encyclopedia. The site aims to create high-quality, most complete and well-structured online repository of fine art.
The Library of Economics and Liberty is dedicated to advancing the study of economics, markets, and liberty. The Concise Encyclopedia of Economics (CEE), which is contained in it, provides a wealth of economic analysis about important issues in a comprehensive, yet readable and engaging format.
Uncyclopedia is "the content-free encyclopedia that anyone can edit". It is formatted as a parody of Wikipedia and aims ultimately to parody all encyclopedic subjects. Read it for fun.
Free eBooks and Digital Libraries
Project Gutenberg is the first and largest single collection of free electronic books, or e-books. Michael Hart, founder of Project Gutenberg, invented e-books in 1971 and continues to inspire the creation of e-books and related technologies today.
The World Public Library Consortia, Founded in 1996, has the world's largest digital archive of PDF eBooks and eDocuments. So far its collection hosts more than 500,000+ PDF eBooks and eDocuments, and will reach 600,000 by fall of 2008.
Internet Archive: Text Archive provides a huge collection of free e-books that are downloadable and readable online, coming from American Libraries, Canadian Libraries, Universal Library, Project Gutenberg, Biodiversity Heritage Library, and others.
eBooks@Adelaide, The University of Adelaide Library's Electronic Text Collection, is a collection of web book editions of significant works from the past.
The arXiv is a repository of electronic preprints, known as e-prints, of scientific papers in the fields of mathematics, physics, astronomy, computer science, quantitative biology, statistics, and quantitative finance, which can be accessed online.
The Biodiversity Heritage Library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity community.
The Digital Library for Earth System Education (DLESE) is a distributed community effort involving educators, students, and scientists working together to improve the quality, quantity, and efficiency of teaching and learning about the Earth system at all levels.
JSTOR is a digital library founded in 1995. Originally containing digitized back issues of academic journals, it now also includes books and primary sources, and current issues of journals.
Cambridge Digital Library - University of Cambridge holds the largest and most important collection of the scientific works of Isaac Newton (1642-1727).
The Einstein Archives Online Website provides free access to Albert Einstein's scientific and non-scientific manuscripts.
The Collected Papers of Albert Einstein presents all 13 volumes published to date by the editors of the Einstein Papers Project, covering the writings and correspondence of Albert Einstein (1879-1955) from his youth to 1923.
The Turing Digital Archive contains nearly 3,000 images of letters, photographs, newspaper articles, and unpublished papers by or about Alan Turing.
The Library of Economics and Liberty provides free e-books and essays representing classics of economic thought, both historical and modern.
Bartleby.com: Great Books Online publishes thousands of free online classics of reference, literature and nonfiction.
Planet eBook offers a selection of free classic books in PDF format. It allows users to download those books and give them to others.
Page By Page Books provides a selection of classic books in the public domain, all in convenient Page By Page format. From Aesop to H. G. Wells and everything in between.
ReadPrint is a free online library offering thousands of free e-books which cover fiction, non-fiction, essays, plays, poetry and short stories.
Cmadras.com provides a collection of free e-books in HTML format, by authors including Robert Louis Stevenson, Bram Stoker, Alexandre Dumas, Victor Hugo, Charles Dickens, Henry James, and Jane Austen.
Internet Archive: Audio Books & Poetry provides free audio books and poetry recordings, coming from LibriVox, Gutenberg Audio Books, Maria Lectrix Audio Books, Audio Poetry, Naropa Poetics Audio Archives, Globe Radio Repertory, and others.
Free Classic Audio Books provides free downloads of many classic audio books in either mp3 format or mp4 audio book format.
LoyalBooks.com provides free downloads of thousands of audio books in mp3, iPod and iTunes formats, covering a wide variety of genres: adventure, children, fiction, history, literature, poetry, and more.
Podiobooks.com provides free audio books delivered as podcasts. All the books on Podiobooks.com are provided by the authors, who want to do this to get exposure for their work or simply do it for the sheer joy of writing.
E-Books Directory is a free web resource which contains links to free downloadable e-books, technical papers, documents, as well as user contributed content, articles, reviews and comments.
Scribd.com is a document sharing website, where users can publish, discover and discuss original writings and documents. It has more than 5 million iPaper documents in 90 different languages.
Free-ebooks.net is an online source offering free e-book downloads. And it enables users to find books that they want to read by browsing its e-book resources and e-book authors.
Freebookcentre.net contains links to thousands of free online technical books which cover computer science, computer languages, mathematics, physics, and electronics engineering.
FreeComputerBooks.com provides a directory service of online free computer and programming related books and documents. The directory is categorized by 12 topics including Computer languages, Computer science, Databases, Electronic engineering, Java and J2EE, Linux and Unix, Mathematics, etc.
FreeTechBooks.com offers free online computer science, engineering and programming books, textbooks and lecture notes.
FreeScience.info is an online initiative offering free download of scientific books. Users can find books that they want to read by using search tool and browsing categorical list or alphabetical index.