Books Should Be Free also makes it very easy to find the text for each book.
Another site I would like to introduce is LoudLit.org. "Lit" in the title means "literature." The "About" part of the website says "LoudLit.org is committed to delivering public domain literature paired with high quality audio performances." I agree that the sound quality and the quality of the reading performances are very good. Librivox has some very good recordings but some are not very good. LoudLit.org is much more consistent in presenting high-quality audio books. The number of books, however, is smaller. Another feature of LoudLit.org that I think is very nice is the Read & Listen function. (Click on the link to try it out.)
Finally, verkaro.org also provides very high quality recordings. Unfortunately, verkaro.org does not provide links to the texts that they have recorded but you should be able to find all of the texts on the web if you search for the titles.
