http://www.gutenberg.org/wiki/Main_Page
From Project Gutenberg, the first producer of free electronic books (e-books). There are 20,000 free books in the Project Gutenberg Online Book Catalog.
 
http://www.readprint.com/
This website offers a free online library with thousands of free books for students, teachers, and the classic enthusiast. 
 
http://www.classicauthors.net/
This website offers online texts of a variety of authors such as Shakespeare,
Samuel Johnson, Mark Twain and many more.
 
http://onlinebooks.library.upenn.edu/
At this website you will find a destination which lists over 25,000 free books on the Web.
 
http://etext.library.adelaide.edu.au/
eBooks@Adelaide
: There is a collection of Web books at this website including more than 700 classic works of literature, philosophy, science, and history.
 
http://eserver.org/
This website offers online books particularly in the arts and humanities.
 
http://www.classicreader.com/
Classic Reader :There is a large collection of free online classic books by authors such as Dickens, Austen, Shakespeare and many others at this website.
 
http://www.childrensbooksonline.org/
Children's Books Online: the Rosetta Project. Here user will find a large collection of illustrated antique children's books online.
 
http://manybooks.net/
Free PDA e-books. Many thousands of public domain e-books from Project Gutenberg and elsewhere. They're available here either to read online in plain text or formatted to download for the Adobe Reader, Palm eReader, Palm Doc, iSilo, Rocketbook and other r-reader software's.
 
http://www.starry.com/free-online-novels/index.htm
Free Novels Online and Free Online Cyber books Nearly fifty new novels ranging over many genres, including SF/Fantasy, mystery, romance, humor and lots more. A gift from new authors seeking your attention. Either as HTML or as downloadable files.
 
http://www.bookrags.com/browse/ebooks/
This website offers a large collection of e-Books to read online for free.
 
http://67.118.51.201/bol/default.cfm
Books-On-Line - A Directory of books that are posted on the net and available for downloading at no charge along with new books being published.
 
http://www.globusz.com/
At this website you can find general free eBooks. 
 
http://www.magickeys.com/books/
Children's Storybooks Online. At this website you will find children's storybooks online.
 
http://www.pagebypagebooks.com/
Offers hundreds of classic books you can read right now, all absolutely free!