1, OnlineComputerBooks – contains details about free computer books, free ebooks, free online books and sample chapters related to Information Technology, Computer Science, Internet, Business, Marketing, Maths, Physics and Science which are provided by publishers or authors on their websites
2, SnipFiles – offers free software and book downloads in PDF or Word format.
3, BookYards – offers around 16,000 books, and other reading materials including web links, videos, ebook links and access to online libraries.
4, The Online Books Page – provides access to books that are freely readable over the Internet. Lists over 35,000 free books available online.
5, AskSam Ebooks – organizes, searches, and manages online information. askSam offers free ebooks downloads as well.
6, Baen Free Library – offers both free e-books downloads and online viewing from their site.
7, Free ebooks.info – covers various subjects including arts and photography, memoirs, business and investing, children’s books, and more.
8, Know Free – offers free e-books download. Their e-books were gathered through exchanges with users.
9, Spot Bit – offers both free and paid e-books and magazines. Registration required.
10, ebookshare.net – provides links to thousands of e-books available for download. Does not host the e-books but the links to their download sites instead.
11, EBOOKEE – a free ebooks search engine offering free ebooks download library. It’s an open directory for free ebooks and download links.
12, Wowio – lets you legally access high-quality copyrighted ebooks from leading publishers for free. Covers a wide range of offerings, including works of classic literature, college textbooks, comic books, and popular fiction and non-fiction titles.
14, FreeBookSpot – has more than 90 categories of free e-books with topics ranging from fiction, to sciencitific programming and more.
15, 4eBooks – a comprehensive source of free e-books covering computer programming. The site was made in a blog-like layout.
16, Free-eBooks – offers unlimited e-books downloads covering many categories. You can also subscribe to the site’s RSS feeds to get updates about new e-books added to the site.
17, ManyBooks – lets you browse through popular titles, recommendations, recent reviews. There are 23,216 eBooks available online.
18 GetFreeEBooks – free ebooks site where you can download free books totally free. The ebooks which you find within this site are collected from all over the net or either personally compiled by the site owner.
19 FreeComputerBooks – contains a huge collection of Free online Computer, Programming, Mathematics, Engineering, and Technical Books, Lecture Notes and Tutorials. The e-books are categorized by topics, with 12 top level categories, and over 150 sub-categories.
20, FreeTechBooks – a list of free online computer science, engineering and programming books, ebooks, texts, textbooks, lecture notes, documentations and references.
21, Scribd – offers free downloads of e-books in PDF format. These e-books were submitted/uploaded by users, so they are freely available for download.
22, Globusz – a unique epublishing site that offers free e-books download as well. Covers fiction and non-fiction titles.
23, OnlineFreeEBooks – prides itself for providing a real e-book download service and not just links to e-books site.
24, MemoWare – contains thousands of documents for PalmOS device, Pocket PC, Windows CE, EPOC, Symbian or other handheld device.
25, World Public Library – the world’s largest digital archive of PDF e-books and other eDocuments. Membership is required to download books and to get access to their entire collection.
Project Gutenberg – Of course, a list of top free e-books sites will not be complete if Project Gutenberg is not included. It is really your ultimate resource for millions of e-books but the site needs a little bit of polishing when it comes to usability though.