Here are some more:
Free ebooks
http://www.balajisebookworld.com/page_3.html (Free Downloads)
http://www.coolscifi.com/forums/sci-fi-fantasy-books/free-online-novels-116808/
http://www.free-online-novels.com/
http://www.life-after-harry-potter.com/
A grand total of over 100,000 titles is available at Project Gutenberg Partners, Affiliates and Resources.
http://www.gutenberg.org/wiki/Main_Page
http://www.literaturemaster.com/
http://www.truly-free.org/
http://www.bibliomania.com/
http://www.readprint.com/
http://www.readbookonline.net/
http://www.fictionpress.com/
http://etext.lib.virginia.edu/
http://www.free-ebooks.net/
http://manybooks.net/
http://www.worldwideschool.org/library/catalogs/bysubject-top.html
http://www.thefreelibrary.com/
http://www.baen.com/library/
http://www.ebooks3.com/
http://www.bookyards.com/
http://www.free-online-novels.com/
http://www.starry.com/novel/authors.htm