Christian Classics Ethereal Library
This site is an effort currently supported by Calvin College; previously the project was supported the University of Pittsburgh. The CCEL is a vast library of public domain texts relevant to evangelical Christianity. Among many significant works, the early church fathers are available here for free.
Nearly 700 books and 998 short stories by over 200 authors. All documents are full text and public domain.
Electronic Text Center
This University of Virginia site features approximately 70,000 on- and off-line humanities texts in thirteen languages, with more than 350,000 related images.
This site is a vast collection of medieval texts.
Primary Texts: Philosophy & Theology
Georgetown University’s online database of primary texts. Authors include Aristotle, Augustine, Aquinas, and Plato.
Primary Texts: The Reformation
Original texts of the Protestant Reformation and Catholic Counter-Reformation. Authors include Luther, Calvin, Zwingli, and Melanchthon.
This site is a source of free materials. There are some 6,000 e-books.
The Internet Classics Archive
M.I.T.’s compendium of literary classics, especially from ancient texts.