Offers an online library that makes accessible information for almost everything.
http://www.ipl.org/
Official site offering the biggest online library in the world.
http://www.questia.com/
Online source for more than 1400 of books on philosophy and yoga by Sri Chinmoy. Includes talks, poems, stories, plays, questions & answers, and humor. Searchable database.
http://www.srichinmoylibrary.com/
Free online classics of reference, literature and nonfiction.
http://www.bartleby.com/
Read free online literature, book notes and summaries, author biographies, reference books, study guides, and buy books online.
http://www.bibliomania.com/
Papers and books about scientific research and Biblical understanding, and biographical information about the author.
http://www.custance.org/
Offers Greek and Latin learning tools, including online grammar books, tutorials and ebooks by Homer, Plato, Aristotle, Sophocles.
http://www.textkit.com/