There are a lot of sources for free ebooks and ebook stores in the WEB. Browsing blogs and social bookmarks we found enough to compile a huge list from them, so here they are in no particular order.

PLS, BE ATTENTIVE TO COPYRIGHT LAWS. It is reader’s responsibility to respect local laws and follow them.

Gutenberg Project Top 100 – Popular books from the oldest producer of free ebooks on the Internet. Searchable data base for many different languages ebooks.

BookMooch - Community for exchanging used books

ebookSpyder – Specializes in technical books ranging anywhere from C# to AJAX

Google Book Search – Read online and download the classics

http://www.ebooksgratuits.com lots of French free ebooks

http://www.aozora.gr.jp  free ebooks in Japanese

http://www.liberliber.it/biblioteca/index.htm Italian language online library

http://www.lonnrot.net Swedish and Finnish ebooks

http://lib.rus.ec - more then 130000 Russian ebooks in FB2 and txt format

Dwalin – plain text novels

Free Computer Books – Technical resources about computers

Librivox – Audio works and podcasts of books

CliffsNotes – Get the notes to cram for the exam

WIkibooks – Free textbooks

DailyLit – Receive small parts of books via email

ManyBooks – Free eBooks for your PDA, iPod, or eBook reader

BookCrossing – Where real books are released into the wild to be found by others

LibraryElf – The perfect companion to a public library system

Scribd – Open library to publish and discover documents online

Word Public Library – 400,000 PDF ebooks for download –

Free Tech Books – Free computer science and engineering books (+ lecture notes)

Bookins – Swap real books with other readers

WellToldTales – Free short story podcasts (like audiobooks, but shorter)

Wowio – Public domain, free legitimate copyrighted materials & one of the only with a selection of Comic Books

BizBooktalk – Free book giveaway contests on Fridays

MoochMuch – Organize your book lending with your friends

CHMPDF – A collection of general interest and technical ebooks

Realtime Publishers – free IT eBooks by many of the world’s best authors

FrugalReader – Trade Books for free

TitleTrader – Swap books, movies, and music

ZunaFish – Trade your old media and books items for new titles you’d rather have

SwapSimple – Swap your used books here

SwapThing – Community of users who swap items including books

BookCart – Internet paperback exchange

SF-Books – Exchange Sci-Fi Books here

PaperbackSwap – Swap books for free

PinkMonkey - 450 Study Guides / Booknotes / Online Chapter Summary Notes and Analysis

eBookWorld – Technical resources

Flaxx – IT and computer books

Baen Library – Free science fiction and fantasy novels

LibraryThing – Social networking and free books

Online Books Page – Facilitates access to books that are freely readable over the Internet

BookRags – Research material in the form of eBooks Technical Books Online – Old tech books from the “vacuum tube age” of electronics

ebookSearchr – Google powered

Internet Archive – The Intenet indexed – that includes a vast text library

BookYards – Books, videos, education materials

Memoware – Free books for your PDA

DocStoc – online document sharing website. the “YouTube of documents”

FreeBookSpot is an online source of free ebooks download with 4485 FREE E-BOOKS in 96 categories which up to 71,97 GB.

4eBooks has a huge collection of computer programming ebooks. Each downloadable ebook has a short review with a description. You can find over thousand of free ebooks in every computer programming field like .Net, Actionscript, Ajax, Apache and etc.

Free-eBooks is an online source for free ebook downloads, ebook resources and ebook authors. Besides free ebooks, you also download free magazines or submit your own ebook.

ManyBooks provides free ebooks for your PDA, iPod or eBook Reader. You can randomly browse for a ebook through the most popular titles, recommendations or recent reviews for visitors. There are 21,282 eBooks available here and they’re all free!

GetFreeEBooks is a free ebooks site where you can download free books totally free. All the ebooks within the site are legal downloadable free ebooks.

PlanetPDF – A small collection of classic novels all in PDF format.

DailyLit – Read books online by daily email and RSS feed.

Wikibooks – Wikibooks is a Wikimedia community for creating a free library of educational textbooks that anyone can edit.

Dwalin – Free novels in text format.

Adobe Free eBooks – In Adobe’s Free eBooks area, you can download, unlock, and read electronic books on your personal computer or reading device.

Alive & Free – A page of links to some recent books from living authors available free online.

Franklin – Thousands of free titles in text and HTML file formats.

Read Easily – An ebook online library which has been designed to provide you an adaptive reading experience!

PDFbooks – This new site offers around 4,700 downloadable public domain e-books.

Witguides – An online source for a wide range of useful e-books that are completely free with no need to sign-up or buy anything.

Diesel eBooks -Offer free ebooks formatted for both Microsoft Reader and Mobipocket.

Free eBook Miners –
Free eBooks for your education, research or amusement.

Planet eBook –
Free classic literature to download and share.

e-Library – Plenty of free ebooks available for download.

BookBoon – Provides free ebooks for students and travelers in PDF format. No registration is required.