The Electronic Text Center at the University of Virginia
http://www.lib.virginia.edu/etext/ETC.html
This site contains thousands of texts, in Modern, Early Modern, and Middle English, plus French, German, Japanese, and Latin. Here you will find fiction, science fiction, poetry, theology, essays, histories, and many other types of materials. This site is excellent and thorough. Although a huge number of these texts are freely available, some texts are available only to users at the University of Virginia--the licensors of these texts have not permitted the University to make them widely available.