Sources for Kindle Books free or inexpensive.

• Inkmesh"A search engine for ebooks"
• Kindle Daily DealChanges at midnight each day
• Free Kindle Books BlogDiscussion of free and cheap books for kindle. Updated daily. Perhaps a little too focused on Amazon itself.
• Baen Free LibraryFree to download ebooks. Pretty good list
• Baen Main EbooksLots of non free, but pretty inexpensive books, including blocks of books by month.
• Amazon daily free list I hope this link stays updated, but I may need to modify it. Also it does not differenciate between "free for Amazon Prime Suckers" and "free for everyone"
• Gutenberg ProjectPublic Domain works. Lots of stuff from pre 1923, and some more recent.
• Google ebooks Not free, nor are these kindle by default and might need to be loaded into Calibre first.
• Google Books for under $5Just a filter on the previous list
• Kindle world Blog
• 100 Kindle Books for $3.99 or less
• "Magic" catalog of mobi books from Gutenberg.Loads on the kindle and gives an instant access to Gutenberg stuff.
• FreeKindleBooks.orgWhat it says on the box. A pretty big block of free books.
• Independent Publishers
• Pixel of InkTo be investigated
• Free kindle books and tipsTo be investigated
• e-reader IQTo be investigated
• MunseysTo be investigated
• Amazon most popular free classicAt least they are supposed to be free
• The Internet ArchiveMillions of books!
• Open LibraryBe sure to check the "Show Only Ebooks" box.
• Many booksTo be investigated.
• Amazon's 100 best sellersTo be investigated.
• World Public LibraryPDFs of lots of books and other documents.
• FictionwiseBarnes and Noble's ebooks (Paid)
• MobipocketSome claim these are cheaper on Amazon
• WowioGraphic Novels? Most paid
• FictionPressSelf Published I don't have high hopes
• KindleReader BlogTo be investigated
• McMillian Press EbooksNone free that I see.
• Ebook FindsMight be a personal site.
• Cory Doctorow's personal siteMany of his works can be downloaded from here.
• 40 Places40 Places for College Students to Find Free Unabridged Books Online.
• Robert Burton RobinsonNo idea who he is, but here are his e-books.
• Free Online NovelsThe page looks horible. No idea about the literature.
• Books On BoardNo idea about the literature.
• Resource shelfNo idea about the literature.

Notes

• The Way We Live Now by Anthony Trollope Referenced in article Josie posted, looks interesting.
• Wikipedia entry on kindle
• Linda J. Halbert says: Get on facebook and type in ereader news today. ENT sight, red with black letters, will pop up. You can subscribe to this site and they send you a newsletter daily with 12 or more books you can download for free. IT is a nice variety of self help, youth, suspense, thrillers, and children's books. These are the best free books I have found so far.
• Many ways to send stuff to kindle