1) Freecomputerbooks.com if you are you looking for programming books ? On FreeComputerBooks one can easily find tons of free Computer Books, Mathematics, Technical Books and Lecture Notes. In addition one could also find ebooks for Windows, Linux, Java,JS, HTML, C++, DB, Python and all kinds of ebooks on Networks. There is no registration required.
2) Smashwords.com is a very professional site. The site claims to be the world’s largest distributor of indie ebooks. On smashwords there are close to 12,000 ebooks available for free download in various formats and languages. Once again no registration is required.
3) Feedbooks.com At feedbooks.com you discover thousands of public domain and original ebooks. We shall rate the site 5 out 5 stars on User Experience. The sites well defined layout it is very easy to discover ebooks. The books are categorized in a way that you can easily find what you’re looking for. The site doesn’t require any registration.
4) GetFreeEbooks.com is another interesting site that offers platform for both authors and readers The only condition is that Authors have to offer free ebooks. In return they benefit greatly from the large community of readers. You can download ebooks from without any registration. We shall rate the site 3 out of 5 stars on usability.
5) Bookdepository offers over 11.000 great ebooks for free in PDF format (many of which are strange and obscure like). They thrust that if you like the book you’ve downloaded you may even want to buy a physical copy. All books can be downloaded directly without registration.
6) freepdfs.net is last site on our list. The sites has million of pdfs listed on the site. The usability of the site is not that great. We shall only give 2 stars out of 5 to this site. The biggest benefit of the site is that you could read without downloading.